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This paper examines whether a web-based training on English discourse intonation leads to better spontaneous speech quality for Mandarin Chinese speakers who reside in the U.S. and in China. The four-week fully online training consisted of meta-instruction videos as well as listening and speaking activities, including instant visual pitch contour feedback and individualized evaluation. The students gave a one-minute spontaneous speech on a given topic at the beginning and the end of the study via videoconferencing. Four native English speakers judged the students' speech comprehensibility, fluidity, accent, confidence and attractiveness, in addition to their intonation performance. Two-way ANCOVA test results show that the experimental group made statistically significant improvement in their speech comprehensibility and speaking confidence. In contrast, the control group did not show improvement. The participants' residence in the U.S. or in China did not affect the training effects. There was not an interaction between the participants' residence and the training. The web-based training, visualization and CMC technology provided an effective scaffolding experience and benefited both EFL and ESL students equally. This study also explores Chinese students' challenges with specific intonation features based on both the raters' judgments and the learners' self-evaluations. The results suggest they have more difficulties with thought groups and prominence than with tone choices. While the trainees gave high ratings to all the activities, they preferred individualized evaluation from the researcher to self-created visual feedback using Praat. The findings have implications for Chinese L1-specific intonation instruction and developing web-based computer assisted pronunciation training systems.

This work extends previously described applications of ultrasound technology in illustrating cardiovascular phenomena to investigation of learning effectiveness. To this end, learning in ultrasound-enhanced classes was assessed by quantifying the improvement in single best answer (SBA) exams conducted before and after an ultrasound practical class. This improvement was then compared to that seen in the same SBA exams conducted in matched groups that undertook similar classes conducted without ultrasound equipment. The SBA exams were designed to include questions that directly related to the phenomena being investigated in the practical classes as well as other "filler" questions to disguise the intent of the exam and ensure that standards of physiology knowledge were similar between the two groups. Any small statistically significant gains in performance observed between the two groups were confounded by differences in baseline (pretest) performance between the groups. These results contradict our previous work, which showed that self-reported measures of learning increased after ultrasound classes. It may be optimistic to expect improvements in deep learning and test performance immediately after even the most effective educational intervention. Direct measurement of the phenomena that bring about deep, long-term learning in classes remains problematic. Notwithstanding this, there is much evidence for the value of enhancing physiology learning by providing varying contexts in the physical, semantic, and cognitive domains. Ultrasound technology is a cheap and effective means of providing such context in physiology practical classes.

Until recently, built environments have been designed exclusively to meet the needs of neurotypical populations; however, there is increasing recognition of the need to make built environments more accommodating for neurodiverse populations, including autistic individuals. This scoping review aims to comprehensively explore and synthesise this literature on the internal built environment for autistic individuals providing recommendations for designers, policymakers and clinicians. Five electronic databases were searched, resulting in a total of 28 studies being reviewed. Recommendations are provided for design and construction, lighting, sound, aesthetics, temperature and air quality. While in its early stages, evidence demonstrating the impact that particular qualities of light, colour, sound and spatial planning have on the human sensorium is emerging. In turn, this new knowledge is informing design decisions that are progressing interior environments towards inclusivity. Understanding the positive and negative impacts of decisions made in the design of the built environment has the potential to facilitate the participation and inclusion of autistic individuals.

Purpose: The purpose of this study was to identify common clinical practice patterns for providing advanced noise management features in children with cochlear implants (CIs) and evaluate trends in consideration of clinician experience and comfort with CI manufacturer-specific technology. Method: A mixed-model survey including quantitative and qualitative questions regarding providing advanced noise management features in the pediatric CI population was collected electronically via research electronic data capture. Survey questions spanned approach/philosophy toward provision of features, age of provision, and demographics of respondents. Descriptive statistics were completed to define common clinical practice patterns and demographic information. Results: A total of 160 pediatric audiologists from 35 U.S. States and five Canadian provinces completed the survey. Most audiologists (73.8%) reported enabling automatic directional microphones, and a vast majority (91%) reported enabling advanced noise processing features such as automatic noise cancellers, wind noise cancellers, and impulse noise cancellers in recipients' main programs. Audiologists ranked features in terms of importance for a school-age child with the top three ranked as automatic noise reduction, automatic directional microphones, and concha-level microphones. Importance of child-specific factors varied depending upon the specific feature of interest. Conclusions: Variability exists among providers in enabling advanced noise management features for pediatric CI recipients. Multiple factors, including patient characteristics, provider characteristics, and limited evidence-based guidance, could account for much of the variation. Overall, there is a trend toward automaticity for noise management. Additional studies are warranted to provide the evidence base for confidently programming advanced features for children using CIs.

Sound levels and acoustic characteristic information was obtained in classrooms serving children who are deaf and hard of hearing (DHH) in grades K-2 in a variety of settings across the United States and Canada. Sound levels were easily measured using iPads, and acoustic characteristics were documented. Noise levels exceeded the American National Standards Institute standard for all 38 unoccupied classrooms. Classrooms in general education settings were significantly quieter than classrooms where children who are DHH received separate instruction, although significant differences did not emerge for occupied classrooms. Remote microphone technologies (such as personal-worn FM/DM systems or classroom sound field systems) were used significantly more in general education than separate instruction classrooms. Results indicated an unfavorable environment for children who are DHH to successfully access spoken language communication. This information about classroom noise levels, combined with knowledge of standards, acoustic characteristics, and sound abatement strategies is essential for parents, teachers, and administrators to secure acoustically favorable classrooms for children who are DHH.

According to the principle of inverse effectiveness (PIE), weaker responses to information in one modality (i.e., unisensory) benefit more from additional information in a second modality (i.e., multisensory; Meredith & Stein, 1986). We suggest that the PIE may also inform whether perceptual fluency affects judgments of learning (JOLs). If JOLs follow the PIE, the differences in JOLs for multisensory and unisensory items should increase as the unisensory study items become harder to perceive. That is, an influence of perceptual fluency should prompt a similar, interactive pattern across perceptual responses and JOLs. In 3 experiments, we systematically varied the signal intensity or noise in 1 modality to examine how responses might change with the inclusion of information in a second modality. In Experiment 1, written words in several font sizes were sometimes accompanied by spoken equivalents. In Experiments 2 and 3, spoken words in various background noise levels were sometimes accompanied by visual speech articulations. Consistent with the PIE, the multisensory benefits in response time and/or correct identification increased as responses to unisensory information decreased. Also, the multisensory formats received higher JOLs than the unisensory formats; however, unlike the predictions from PIE, this difference did not increase as study items became harder to perceive. Experiment 3 extended this finding to participants' explicit beliefs. In multisensory settings, JOLs may rely more on theory- than data-driven processes. We suggest that broadly defined processing fluency may always contribute to JOLs, but, regarding perceptual information, JOLs appear to track perceptual attributes rather than perceptual fluency.

Purpose: We describe the natural auditory environment of people with cochlear implants (CIs), how it changes across the life span, and how it varies between individuals. Method: We performed a retrospective cross-sectional analysis of Cochlear Nucleus 6 CI sound-processor data logs. The logs were obtained from 1,501 people with CIs (ages 0-96 years). They covered over 2.4 million hr of implant use and indicated how much time the CI users had spent in various acoustical environments. We investigated exposure to spoken language, noise, music, and quiet, and analyzed variation between age groups, users, and countries. Results: CI users spent a substantial part of their daily life in noisy environments. As a consequence, most speech was presented in background noise. We found significant differences between age groups for all auditory scenes. Yet even within the same age group and country, variability between individuals was substantial. Conclusions: Regardless of their age, people with CIs face challenging acoustical environments in their daily life. Our results underline the importance of supporting them with assistive listening technology. Moreover, we found large differences between individuals' auditory diets that might contribute to differences in rehabilitation outcomes. Their causes and effects should be investigated further. From learning language in a noisy nursery to tea time at the retirement home, different stages of life are characterized by different environments. Each of these comes with particular learning tasks and social interactions. For 360 million people with hearing loss (World Health Organization, 2015), the environment also provides acoustical challenges that can jeopardize learning and social participation. This holds true for those who perceive sounds through a cochlear implant (CI).

This study was designed to examine two aspects of sight-singing instruction: (1) solfege syllables versus the syllable "loo" for singing patterns and (2) the use of related songs (songs that began with tonal patterns being studied) as compared with unrelated songs. Second-grade students (N = 193) enrolled in general music classes participated in 25 minutes of sight-singing instruction for 16 sessions. In each session a new four-note pattern and song were introduced, and previously learned patterns were reviewed. Four levels of instructional treatment were examined as the independent variable: (1) related songs/solfege, (2) related songs/"loo", (3) unrelated songs/solfege, and (4) unrelated songs/"loo". Pitch and contour accuracy of familiar and unfamiliar patterns were examined as dependent variables on sight-singing pre-, post-, and retention tests. Results indicated significant pre- to posttest improvement in sight-singing skills. Most post- to retention test differences were nonsignificant, indicating skill retention. Sight-singing skills transferred to unfamiliar patterns. Treatment effectiveness differed by pattern familiarity. Solfege with familiar patterns and a neutral syllable ("loo") with unfamiliar patterns resulted in significantly greater contour accuracy. Relating patterns to songs had no significant effect on achievement. (Contains 2 figures and 1 table.)

Research linking loud sounds to hearing loss in youngsters is now widespread, resulting in the issuance of warnings to protect children's hearing. However, studies attesting to the adverse effects of intrusive sounds and noise on children's overall mental and physical health and well-being have not received similar attention. This, despite the fact that many studies have demonstrated that intrusive noises such as those from passing road traffic, nearby rail systems, and overhead aircraft can adversely affect children's cardiovascular system, memory, language development, and learning acquisition. While some schools in the United States have received funds to abate intrusive aircraft noise, for example, many schools still expose children to noises from passing traffic and overhead aircraft. Discussion focuses on the harmful effects of noise on children, what has to be done to remedy the situation, and the need for action to lessen the impacts of noise from all sources. Furthermore, based on our knowledge of the harmful effects of noise on children's health and the growing body of evidence to suggest the potential harmful effects of industrial wind turbine noise, it is strongly urged that further studies be conducted on the impacts of industrial wind turbines on their health, as well as the health of their parents, before forging ahead in siting industrial wind turbines.

This article argues that theoretical understandings of multimodality have enormous potential for assessment purposes in secondary school contexts. Informed by the work of three researchers in three North American high schools, the article offers vignettes of the effective assessment of communicative competence in English classrooms that draws on multimodality and design epistemologies. Building on the work of Bearne (2009) and others, the article contributes to the burgeoning literature on new approaches to assessment in a digital and multimodal age by offering three different perspectives on new assessment frameworks with recommendations for a way forward. The article sets out to trouble the notion of assessing modes such as sound, space and visuals in a word-ruled discipline. (Contains 3 tables.)

This article examines how a second language (L2) dialect affects how accurately the L2 is perceived and produced. Specifically, the study examined differences between the production and perception of French vowels /i/, /y/, and /u/ by learners of either Quebec French (QF) or European French (EF). These vowels differ across the two varieties, both acoustically and because of assibilation of /t-d/ before /i-y/ for QF versus EF. As a result of these differences, QF has an additional acoustic cue with which to contrast /u/ and /i-y/. Anglophone learners of QF or EF were asked to identify and discriminate both QF and EF vowels and to produce the vowels in several phonetic contexts. Results indicate that QF learners were more accurate at discrimination and identification of these vowels as produced by both QF and EF speakers and that L2 dialect exposure affects how well learners perceive and produce these French vowels. (Contains 7 notes, 1 table, and 5 figures.)

Background: Noise-induced hearing loss is a major cause of deafness and hearing impairment in the United States. Though genetics and advanced age are major risk factors, temporary and permanent hearing impairments are becoming more common among young adults and children especially with the increased exposure to portable music players. Though treatment options are limited for most people with noise-related hearing loss, several modifiable health behaviors that should begin in childhood might prevent or delay the onset of hearing impairment. The purpose of this article is to review modifiable and nonmodifiable risk factors, comorbidity, and the role of health education in the prevention of noise-induced hearing loss. Methods: Review of current literature in the etiology, prevention, and treatment of noise-induced hearing loss as well as the role of health education. Results: Nonmodifiable risk factors related to noise-related hearing loss include increasing age, genetics, male gender, and race. Modifiable risk factors are voluntary exposure to loud noise, nonuse of hearing protection, smoking, lack of exercise, poor diet, tooth loss, and the presence of diabetes and cardiovascular disease. Conclusions: As hearing impairment among children and teenagers rises due to mostly voluntary exposure to loud noise, there are many implications for health education. Health educators need to address barriers to the use of hearing protection, deliberate exposure to loud music, and other modifiable risk factors, which cause and exacerbate hearing loss among those exposed to loud noise.

The advent of the gramophone transformed the cultural conditions of contemporary music, including the way it was taught. For a considerable period of time, musicians and music educators disparaged the gramophone. The members of the musical appreciation movement were more sympathetic and helped transform the gramophone's educational image during the 1920s and 1930s. They argued that the gramophone, contrary to its detractors, might stem the appeal of popular music. As is clear from the sentiments of those espousing the pedagogic uses of the gramophone--which are analysed in this paper--their advocacy went far beyond music and was part of a broader cultural agenda, which included arresting the moral dangers associated with popular music.

Using acoustics to survey for bats has increased as the need for data on increasingly rare species has also increased. We set out to better understand the difference between mist netting and acoustic detection probabilities between these two methods for the little brown bat (Myotis lucifugus), a species highly impacted by white‐nose syndrome and currently considered for federal listing in the United States. We also analyzed occupancy relationships with local and landcover variables. We surveyed 15 sites using mist netting paired with an acoustic recorder for multiple nights to estimate detection probability of this species. We also deployed acoustic recorders at another 73 sites. We found that detection rates for mist netting were very low but increased with day of year and decreased from proximity to water. Acoustic surveys had higher detection rates, but there was an approximately 30% likelihood of false‐positive detections. At the mean distance to water and day of year, acoustic surveys had a detection rate 55 times higher than mist netting. There were not significant factors influencing occupancy of little brown bats, only a slight positive relationship between forested largest patch, landscape patch richness and forest basal area. Given the declines in little brown bat populations since white‐nose syndrome, it is even more critical that we consider the very low detection rate of mist netting compared to acoustic surveys. [ABSTRACT FROM AUTHOR]

During the spring of 2021, a coordinated multi-vessel effort was organized to study physical oceanography, marine geology and biology, and acoustics on the northeast United States continental shelf, as part of the New England Shelf Break Acoustics (NESBA) experiment. One scientific goal was to establish a real-time numerical model aboard the research vessel with high spatial and temporal resolution to predict the oceanography and sound propagation within the NESBA study area. The real-time forecast model performance and challenges are reported in this letter without adjustment or re-simulation after the cruise. Future research directions for post-experiment studies are also suggested. [ABSTRACT FROM AUTHOR]

Personal voice assistants (PVAs) are increasingly used as interfaces to digital environments. Voice commands are used to interact with phones, smart homes, or cars. In the United States alone, the number of smart speakers, such as Amazon’s Echo and Google Home, has grown by 78% to 118.5 million, and 21% of the U.S. population own at least one device. Given the increasing dependency of society on PVAs, security and privacy of these have become a major concern of users, manufacturers, and policy makers. Consequently, a steep increase in research efforts addressing security and privacy of PVAs can be observed in recent years. While some security and privacy research applicable to the PVA domain predates their recent increase in popularity, many new research strands have emerged. This article provides a survey of the state of the art in PVA security and privacy. The focus of this work is on the security and privacy challenges arising from the use of the acoustic channel. Work that describes both attacks and countermeasures is discussed. We highlight established areas such as voice authentication (VA) and new areas such as acoustic Denial of Service (DoS) that deserve more attention. This survey describes research areas where the threat is relatively well understood but where countermeasures are lacking, for example, in the area of hidden voice commands. We also discuss work that looks at privacy implications; for example, work on management of recording consent. This survey is intended to provide a comprehensive research map for PVA security and privacy. [ABSTRACT FROM AUTHOR]

Fronting of the vowels /u, ʊ, o/ is observed throughout most North American English varieties, but has been analyzed mainly in terms of acoustics rather than articulation. Because an increase in F2, the acoustic correlate of vowel fronting, can be the result of any gesture that shortens the front cavity of the vocal tract, acoustic data alone do not reveal the combination of tongue fronting and/or lip unrounding that speakers use to produce fronted vowels. It is furthermore unresolved to what extent the articulation of fronted back vowels varies according to consonantal context and how the tongue and lips contribute to the F2 trajectory throughout the vowel. This paper presents articulatory and acoustic data on fronted back vowels from two varieties of American English: coastal Southern California and South Carolina. Through analysis of dynamic acoustic, ultrasound, and lip video data, it is shown that speakers of both varieties produce fronted /u, ʊ, o/ with rounded lips, and that high F2 observed for these vowels is associated with a front-central tongue position rather than unrounded lips. Examination of time-varying formant trajectories and articulatory configurations shows that the degree of vowel-internal F2 change is predominantly determined by coarticulatory influence of the coda., (© 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).)

The use of acoustics for determining tree stiffness can be helpful to improve end product value. However, methods to monitor equipment calibration in the field is limited. This experiment endeavored to test the hypothesis that ASTM D198 is an alternative way to monitor calibration performance in the field. ASTM D198 is a standard test method to test the static modulus of elasticity of structural lumber and is a common test in many local sawmills within the United States. Southern pine lumber (Pinus spp.) was first tested at a local sawmill for modulus of elasticity as per ASTM D198-14. Then acoustic probes were placed 7 feet apart in nominal 2x4 lumber and correlation equations between lumber stiffness and acoustic speed was developed. We then built regression curves for each machine using the lumber derived data, but applied it onto trees. This study found that all three machines gave a statistically equal reading to the reference machine after readjustment with ASTM D198 and supported the hypothesis that the ASTM standard could be an additional monitoring procedure in the field. Meanwhile, we do caution that this standard not be used as a calibration substitution but just as a monitoring check. We feel more studies are warrantied where the log being tested is harvested and converted to small clears or lumber, and then a similar study is performed. [ABSTRACT FROM AUTHOR]

Classrooms are host to complex sonic ecologies informed by ritualized patterns and routines, but there remains a dearth of scholarship studying everyday sounds of schooling. Such research is important because it can amplify in new ways how children's identities are constructed and thickened over time. This interpretive case study takes up the question as it interrogates sound's capacity to inform children's identities in a resource-limited, public elementary school in the Midwestern United States. Specifically, this inquiry explored in what ways sonic experiences might (re)produce and/or thicken (systemic) identities and positionings for children. Using critical positioning theories, the author details how sonic (re)occurrences informed children's abilities to know, to be, and to be known in their classroom community. Through listening to the ambient experiences of everyday classrooms, the findings from this study showcase, new possibilities for exploring children's identities and positionings. Through the storied experiences of two boys—acoustically described and analyzed—the author challenges critical early childhood researchers and educators to hear, perhaps for the first time, "unheard" everyday sounds like the alarm and consider the multiple ways such sounds resonate in classrooms. [ABSTRACT FROM AUTHOR]

Acoustic signals are often critical elements of mating displays, and lekking male greater prairie‐chickens (Tympanuchus cupido pinnatus) use their boom vocalization for this purpose. We quantified the acoustic characteristics of the boom chorus created by multiple male greater prairie‐chickens vocalizing simultaneously at leks in Brown County, NE, USA, in 2013 and 2014. We used these data to evaluate (a) the role of the boom chorus in prairie‐chicken breeding dynamics and (b) the impact of a wind energy facility on the acoustic signal of the boom chorus. We sampled the chorus using audio recorders placed in transects extending from leks; the chorus exhibited an average peak frequency of 297 ± 13 Hz. The mean chorus signal‐to‐noise ratio declined from 15.7 dB (50 m) to 2.6 dB (800 m), and wind speed and direction, topography, and relative humidity caused variation in signal‐to‐noise ratio at a given distance and location. Chorus recordings from leks within 1,000 m of a wind turbine had lower signal‐to‐noise ratio (βturbine = −5.659, SE = 1.289) than leks farther from turbines. The chorus signal‐to‐noise ratio increased slightly with more males present on the lek (~0.1 dB for each additional male; βmales = 0.177; SE = 0.037) and considerably more as more females visited the lek (~1.4 dB for each additional female; βfemales = 2.498, SE = 0.235; βfemales2 = −0.309, SE = 0.039). Our results provide support for the signal enhancement hypothesis that proposes the boom chorus is influenced notably by male–male competition for females on the lek, rather than functioning solely to advertise the presence of the lek to recruit females. Our results also suggest the choruses emanating from small leks have the greatest potential to be masked by anthropogenic (wind turbine) noise, which may affect the breeding success of male and female prairie‐chickens. [ABSTRACT FROM AUTHOR]

Objective: To describe the use of robotics-assisted electrode array (EA) insertion combined with intraoperative electrocochleography (ECochG) in hearing preservation cochlear implant surgery., Study Design: Prospective, single-arm, open-label study., Setting: All procedures and data collection were performed at a single tertiary referral center., Patients: Twenty-one postlingually deaf adult subjects meeting Food and Drug Administration indication criteria for cochlear implantation with residual acoustic hearing defined as thresholds no worse than 65 dB at 125, 250, and 500 Hz., Intervention: All patients underwent standard-of-care unilateral cochlear implant surgery using a single-use robotics-assisted EA insertion device and concurrent intraoperative ECochG., Main Outcome Measures: Postoperative pure-tone average over 125, 250, and 500 Hz measured at initial activation and subsequent intervals up to 1 year afterward., Results: Twenty-two EAs were implanted with a single-use robotics-assisted insertion device and simultaneous intraoperative ECochG. Fine control over robotic insertion kinetics could be applied in response to changes in ECochG signal. Patients had stable pure-tone averages after activation with normal impedance and neural telemetry responses., Conclusions: Combining robotics-assisted EA insertion with intraoperative ECochG is a feasible technique when performing hearing preservation implant surgery. This combined approach may provide the surgeon a means to overcome the limitations of manual insertion and respond to cochlear feedback in real-time., (Copyright © 2024, Otology & Neurotology, Inc.)

Purpose: United States national data for tympanometric measures from 16,614 ears included in the National Health and Nutrition Examination Survey for 2015-2016 and 2017-2020 were analyzed and described., Method: Analyses were primarily descriptive and relied on distribution-free medians and cumulative distribution functions (CDFs). Differences between CDFs were examined using Cohen's h effect size. Results are presented for the age range 6-80+ years. A reference interval (RI) approach was pursued in which the interval from the 2.5th to the 95th percentile for healthy ears was specified for peak-compensated static admittance (Y tm +), tympanometric peak pressure, tympanometric width, and equivalent acoustic ear-canal volume (V ea +)., Results: Separate RIs were required for 6- to 13-year-olds compared to those 14-80+ years of age for all four tympanometric measures. For both age groups, a separate RI was warranted for each sex for Y tm + and V ea +. For those 14-80+ years of age, a separate RI was also needed for non-Hispanic Asians for Y tm +. When these RIs were applied to the full data set, about 5%-10% of ears were found to be either below the lower limit or above the upper limit of the RI. Those ears outside the RI limits had about 5 dB higher low-frequency hearing thresholds than those within RI limits. Both Y tm + and V ea + were found to depend on body size., Conclusion: RIs for tympanometric measures from individuals with healthy ears were established, and when applied to the general U.S. population 6-80+ years of age, 5%-10% of ears fell outside the RIs depending on the measure.

The primary purpose of this research report was to investigate the relationships between acoustic characteristics and perceived intelligibility for native Japanese speakers' productions of American English liquids. This report was based on a reanalysis of intelligibility scores and acoustic analyses that were reported in two previous studies. We examined which acoustic parameters were associated with higher perceived intelligibility scores for their productions of /l/ and /ɹ/ in American English, and whether Japanese speakers' productions of the two liquids were acoustically differentiated from each other. Results demonstrated that the second formant (F2) was strongly correlated with the perceived intelligibility scores for the Japanese adults' productions. Results also demonstrated that the Japanese adults' and children's productions of /l/ and /ɹ/ were indeed differentiated by some acoustic parameters including the third formant (F3). In addition, some changes occurred in the Japanese children's productions over the course of 1 year. Overall, the present report shows that Japanese speakers of American English may be making a distinction between /l/ and /ɹ/ in production, although the distinctions are made in a different way compared with native English speakers' productions. These findings have implications for setting realistic goals for improving intelligibility of English /l/ and /ɹ/ for Japanese speakers, as well as theoretical advancement of second-language speech learning.

Objective: To investigate the accuracy and precision of ultrasound shear wave elasticity measurements as a function of target elasticity and acquisition depth. Materials and methods: Using five ultrasound systems (VTQ, VTIQ, EPIQ 5, Aixplorer, and Aplio 500), two operators independently measured shear wave elasticities in two phantoms containing five different target elasticities (8±3, 14±4, 25±6, 45±8, and 80±12 kPa) at depths of 15, 30, 35, and 60 mm. Accuracy was assessed by evaluating measurement errors and the proportions of outliers, while factors affecting accuracy were assessed using logistic regression analysis. Measurement errors were defined as differences between the measured values and 1) the margins of the target elasticity, and 2) the median values of the target elasticity. Outliers were defined as measured values outside the margins of the target elasticity. Precision was assessed by calculating the reproducibility of measurements using the within-subject coefficient of variation (wCV). Results: Mean measurement errors and the proportions of outliers were higher for high than for low target elasticities (p<0.001), but did not differ in relation to acquisition depth, either within an elastography system or across the different systems. Logistic regression analysis showed that target elasticity (p<0.001) significantly affected accuracy, whereas acquisition depth (p>0.05) did not. The wCV for the 80±12 kPa target (31.33%) was significantly higher than that for lower elasticity targets (6.96–10.43 kPa; p<0.001). The wCV did not differ across acquisition depths. The individual elastography systems showed consistent results. Conclusions: Targets with high elasticity showed lower accuracy and lower precision than targets with low elasticity, while acquisition depth did not show consistent patterns in either accuracy or precision. [ABSTRACT FROM AUTHOR]

Scientific questions regarding the impact of anthropomorphic noise in the marine environment have resulted in an increasing number of regulatory requirements and precautionary mitigation strategies to reduce the risks associated with high-resolution marine geophysical surveys performed in waters subjected to government jurisdiction. An example of regulatory frameworks includes the Marine Mammal Protection Act in the United States and the Marine Strategy Framework Directive 2008/56/EC in the European Union. Regulatory compliance often requires an assessment of the potential ecological risks before initiating a marine geophysical survey. However, the acoustic source data needed to estimate the risk associated with the operation of a given high-resolution survey system are frequently lacking. A comprehensive measurement program was performed to quantify the characteristics of sounds radiated by a variety of commercial marine geophysical survey systems, including boomers, sparkers, airguns, chirp sub-bottom profilers, sidescan sonars, and swath-bathymetric sonars [Crocker and Fratantonio, “Characteristics of high-frequency sounds emitted during high-resolution marine geophysical surveys,” Naval Undersea Warfare Center, Newport, RI, USA, NUWC-NPT Tech. Rep. 12, 203, 2016]. Calibrated acoustic source data, including source levels, source spectra, and beam patterns, were acquired for a total of 18 different marine geophysical survey systems. The data support modeling to estimate the potential ecological impacts resulting from the operation of certain high-resolution marine geophysical survey systems. [ABSTRACT FROM AUTHOR]

The purpose of these acoustical patent reviews is to provide enough information for a Journal reader to decide whether to seek more information from the patent itself. Any opinions expressed here are those of the reviewers as individuals and are not legal opinions. Patents are available via the internet at the USPTO website, and also using Google Patents. [ABSTRACT FROM AUTHOR]

In the Southeast USA, major contributors to estuarine soundscapes are the courtship calls produced by fish species belonging to the family Sciaenidae. Long-term monitoring of sciaenid courtship sounds may be valuable in understanding reproductive phenology, but this approach produces massive acoustic datasets. With this in mind, we designed a feature-based, signal detector for sciaenid fish calls and tested the efficacy of this detector against manually reviewed data. Acoustic recorders were deployed to collect sound samples for 2 min every 20 min at four stations in the May River estuary, South Carolina, USA from February to November, 2014. Manual analysis of acoustic files revealed that four fish species, belonging to the family Sciaenidae, were the major sound producers in this estuarine soundscape, and included black drum (Pogonias cromis), silver perch (Bairdiella chrysoura), spotted seatrout (Cynoscion nebulosus), and red drum (Sciaenops ocellatus). Recorded calls served as an acoustic library of signature features that were used to create a signal detector to automatically detect, classify, and quantify the number of calls in each acoustic file. Correlation between manual and automatic detection was significant and precision varied from 61% to 100%. Automatic detection provided quantitative data on calling rates for this long-term data set. Positive temperature anomalies increased calling rates of black drum, silver perch, and spotted seatrout, while negative anomalies increased calling rates of red drum. Acoustic monitoring combined with automatic detection could be an additional or alternative method for monitoring sciaenid spawning and changes in phenology associated with climate change. [ABSTRACT FROM AUTHOR]

The purpose of these acoustical patent reviews is to provide enough information for a Journal reader to decide whether to seek more information from the patent itself. Any opinions expressed here are those of the reviewers as individuals and are not legal opinions. Printed copies of United States Patents may be ordered at $3.00 each from the Commissioner of Patents and Trademarks, Washington, DC 20231. Patents are available via the Internet at http://www.uspto.gov. [ABSTRACT FROM AUTHOR]

Brood X is the largest of the 15 broods of periodical cicadas, and individuals from this brood emerged across the Eastern United States in spring 2021. Using distributed acoustic sensing (DAS) technology, the activity of Brood X cicadas was monitored in their natural environment in Princeton, NJ. Critical information regarding their acoustic signatures and activity level is collected and analyzed using standard outdoor-grade telecommunication fiber cables. We believe these results have the potential to be a quantitative baseline for regional Brood X activity and pave the way for more detailed monitoring of insect populations to combat global insect decline. We also show that it is possible to transform readily available fiber optic networks into environmental sensors with no additional installation costs. To our knowledge, this is the first reported use case of a distributed fiber optic sensing system for entomological sciences and environmental studies., (© The Author(s) 2023. Published by Oxford University Press on behalf of Entomological Society of America.)

Activating patients' immune cells, either by reengineering them or treating them with bioactive molecules, has been a breakthrough in the field of immunotherapy and has revolutionized treatment, especially against cancer. As immune cells naturally home to tumors or injured tissues, labeling such cells holds promise for non-invasive tracking and biologic manipulation. Our study demonstrates that macrophages loaded with extremely low boiling point perfluorocarbon nanodroplets not only survive ultrasound-induced phase change but also maintain their phagocytic function. Unlike observations made when using higher boiling point perfluorocarbon nanodroplets, our results show that phase change occurs intracellularly at a low mechanical index using a clinical scanner operating within the energy limit set by the Food and Drug Administration (FDA). After nanodroplet-loaded macrophages were given intravenously to nude rats, they were invisible in the liver when imaged at a very low mechanical index using a clinical ultrasound scanner. They became visible when power was increased but still within the FDA limits up to 8 h after administration. The acoustic labeling and in vivo detection of macrophages using a clinical ultrasound scanner represent a paradigm shift in the field of cell tracking and pave the way for potential therapeutic strategies in the clinical setting.

Although substantial attention has focused on efforts by the new Administration to block environmental policies, climate politics have been contentious in the US since well before the election of Donald Trump. In this paper, we extend previous work on empirical examinations of echo chambers in US climate politics using new data collected on the federal climate policy network in summer 2016. We test for the similarity and differences at two points in time in homophily and echo chambers using Exponential Random Graph Models (ERGM) to compare new findings from 2016 to previous work on data from 2010. We show that echo chambers continue to play a significant role in the network of information exchange among policy elites working on the issue of climate change. In contrast to previous findings where echo chambers centered on a binding international commitment to emission reductions, we find that the pre-existing echo chambers have almost completely disappeared and new structures have formed around one of the main components of the Obama Administration’s national climate policy: the Clean Power Plan. These results provide empirical evidence that science communication and policymaking at the elite level shift in relation to the policy instruments under consideration. [ABSTRACT FROM AUTHOR]

The purpose of these acoustical patent reviews is to provide enough information for a Journal reader to decide whether to seek more information from the patent itself. Any opinions expressed here are those of the reviewers as individuals and are not legal opinions. Printed copies of United States Patents may be ordered at $3.00 each from the Commissioner of Patents and Trademarks, Washington, DC 20231. Patents are available via the Internet at http://www.uspto.gov. [ABSTRACT FROM AUTHOR]

This paper shows that extraction and analysis of various acoustic features from speech using mobile devices can allow the detection of patterns that could be indicative of neurological trauma. This may pave the way for new types of biomarkers and diagnostic tools. Toward this end, we created a mobile application designed to diagnose mild traumatic brain injuries (mTBI) such as concussions. Using this application, data were collected from youth athletes from 47 high schools and colleges in the Midwestern United States. In this paper, we focus on the design of a methodology to collect speech data, the extraction of various temporal and frequency metrics from that data, and the statistical analysis of these metrics to find patterns that are indicative of a concussion. Our results suggest a strong correlation between certain temporal and frequency features and the likelihood of a concussion. [ABSTRACT FROM AUTHOR]

The purpose of these acoustical patent reviews is to provide enough information for a Journal reader to decide whether to seek more information from the patent itself. Any opinions expressed here are those of the reviewers as individuals and are not legal opinions. Printed copies of United States Patents may be ordered at $3.00 each from the Commissioner of Patents and Trademarks, Washington, DC 20231. Patents are available via the Internet at http://www.uspto.gov. [ABSTRACT FROM AUTHOR]

Objectives: To describe the association between active, environmental tobacco smoke (ETS) exposure and the prevalence of eustachian tube dysfunction (ETD) in the U.S. pediatric population. Study Design: Cross-sectional. Setting: U.S. representative demographic and audiometric data from the National Health and Nutrition Examination Survey (NHANES);2005–2010. Subjects and Methods: The study consisted of 2,977 children aged 12–19 years. ETD was defined as middle ear pressure <100mm H20. ETS was defined as non-active smoking in individuals with serum cotinine over the limit of detection (≥0.015 ng/mL) and <10 ng/mL(N = 1559). Results: The prevalence of ETD was 6.1%. After multivariate adjustment for age, sex, body mass index, education level, ethnicity, or having a cold, sinus problem or earache during the last 24 hours, compared to unexposed children, the odds ratios (95% confidence interval) of ETD for those exposed to ETS ages 12–15 in the first, second and third tertile of cotinine concentrations were, respectively, 1.38 (0.53–3.60), 0.99 (0.53–3.60) and 2.67 (1.12–6.34). Similarly, the odds ratios (95% confidence interval) of ETD for those exposed to ETS ages 16–19 in the first, second and third tertile of cotinine concentrations were, respectively, 1.28 (0.48–3.41), 0.99 (0.40–2.48) and 2.86 (1.19–6.88). Conclusion: These data suggest that children and adolescents exposed to high concentrations of ETS may have an increased prevalence of ETD. [ABSTRACT FROM AUTHOR]

The article reviews several acoustical patents in the U.S. Some of the patents evaluated include a patent for a piezoelectric micro-blower, systems and methods for controlling highly nonlinear acoustic waves or pulses, films and membranes for acoustic signal converter, signal processing apparatus and signal processing method and microelectromechanical loudspeaker array with predetermined period of time of diaphragm relaxation.

Children as young as five have some ability to produce contrastive focus [Wells et al. (2004) J. Child Lang. 31, 749-778]. However, adult listeners' ability to identify the location of contrastive focus depends on whether the speech came from a 4-, 7-, or 11-year-old [Patel and Brayton (2009) J. Speech. Lang. Hear. Res. 52, 790-801]. Recent acoustic studies have also reported the use of F 0 vs duration in contrastive focus productions by American English-speaking 2-year-olds [Thorson and Morgan (2021) J. Child Lang. 48, 541-568] and 4-year-olds [Wonnacott and Watson (2008) Cognition 107, 1093-1101], respectively. This study, therefore, evaluated the extent to which older 6-year-olds, with more language experience, used F 0 and/or duration when producing contrastive focus, and compared this to adult speech. Monosyllabic and disyllabic adjective + noun targets (e.g., green ball) in utterance medial and final position were elicited from 20 Australian English-speaking 6-year-olds and 14 adults in adjective focus and noun focus conditions. Although both adults and children used high F 0 , only adults consistently used word and stressed syllable duration as well. This suggests that children may master the different acoustic cues to contrastive focus at different stages of development, with late cue integration.

The purpose of these acoustical patent reviews is to provide enough information for a Journal reader to decide whether to seek more information from the patent itself. Any opinions expressed here are those of the reviewers as individuals and are not legal opinions. Printed copies of United States Patents may be ordered at $3.00 each from the Commissioner of Patents and Trademarks, Washington, DC 20231. Patents are available via the Internet at http://www.uspto.gov [ABSTRACT FROM AUTHOR]

Purpose: The purpose of this study was to examine the intelligibility of English consonants and vowels produced by Chinese-native (CN), and Korean-native (KN) students enrolled in American universities. Method: 16 English-native (EN), 32 CN, and 32 KN speakers participated in this study. The intelligibility of 16 American English consonants and 16 vowels spoken by native and nonnative speakers of English was evaluated by EN listeners. All nonnative speakers also completed a survey of their language backgrounds. Results: Although the intelligibility of consonants and diphthongs for nonnative speakers was comparable to that of native speakers, the intelligibility of monophthongs was significantly lower for CN and KN speakers than for EN speakers. Sociolinguistic factors such as the age of arrival in the United States and daily use of English, as well as a linguistic factor, difference in vowel space between native (L1) and nonnative (L2) language, partially contributed to vowel intelligibility for CN and KN groups. There was no significant correlation between the length of U.S. residency and phoneme intelligibility. Conclusion: Results indicated that the major difficulty in phonemic production in English for Chinese and Korean speakers is with vowels rather than consonants. This might be useful for developing training methods to improve English intelligibility for foreign students in the United States. [ABSTRACT FROM AUTHOR]

Purpose: Ecologically realistic, spontaneous, adult-directed, longitudinal speech data of young children were described by acoustic analyses. Method: The first 2 formant frequencies of vowels produced by 6 children from different American English dialect regions were analyzed from ages 18 to 48 months. The vowels were from largely conversational contexts and were classified according to dictionary pronunciation. Results: Within-subject formant frequency variability remained relatively constant for the span of ages studied. It was often difficult to detect overall decreases in the first 2 formant frequencies between ages 30 and 48 months. A study of the movement of the corner vowels with respect to the vowel centroid showed that the shape of the vowel space remained qualitatively constant from 30 through 48 months. Conclusions: The shape of the vowel space is established early in life. Some aspects of regional dialect were observed in some of the subjects at 42 months of age. The present study adds to the existing data on the development of vowel spaces by describing ecologically realistic speech. [ABSTRACT FROM AUTHOR]

The purpose of these acoustical patent reviews is to provide enough information for a Journal reader to decide whether to seek more information from the patent itself. Any opinions expressed here are those of the reviewers as individuals and are not legal opinions. Printed copies of United States Patents may be ordered at $3.00 each from the Commissioner of Patents and Trademarks, WA, DC 20231. Patents are available via the Internet at http://www.uspto.gov. [ABSTRACT FROM AUTHOR]

Abstract: Professional aquarists from nine U.S. public aquaria participated in a citizen science project to characterize ambient noise in marine ornamental aquaria containing seahorses (Hippocampus spp.). Participants collected data on tank design specifications and acoustic recordings from the middle of the water column of each tank surveyed. Ambient noise in aquaria was very variable, ranging in total RMS power from 116.3 to 142.9dB SPL (re: 1μPa), with a mean total RMS power of 126.1±0.8dB. Among tank design specifications: wall material, bottom habitat type, and their interaction had significant effects on total RMS power. Glass tanks were significantly louder than acrylic and concrete tanks, but not fiberglass tanks. Bare bottom tanks were significantly louder than tanks with a plenum or gravel bottom. In the context of literature documenting effects of noise on hearing, acoustic communication, and stress, the exposure to loud ambient noise may be deleterious to aquarium fishes in several ways; thus, system soundproofing techniques are offered. This project demonstrated the utility of citizen science to gather a data set across a large geographic area on a feasible budget, while providing opportunities for professional aquarists to understand the acoustic environment of their systems and appreciate the utility of research to improve animal management. [Copyright &y& Elsevier]

Througout the nineteenth century, acoustics or the science of sound in America lagged behind European acoustics which had been rapidly advancing. During this period, the American physicist Alfred M. Mayer made original contributions to acoustics and earned a reputation in Europe, filling a gap in late nineteenth-century American research in acoustics. Lacking fellowship with American acousticians, he was affiliated with the European community of research in acoustics in various respects such as taking up themes of research, employing experimental instruments, learning the practice of research, and adopting specific theories for research. In addition, he tried to naturalise acoustics on American soil by applying expertise to practical problems and creating specialised experimental setups for acoustics education in America. But his research was not taken advantage of by the next generation of American acousticians, who focused on practical technologies such as telephony, the control of noise, and underwater acoustics. [ABSTRACT FROM PUBLISHER]

This paper reviews all engine noise research conducted at the National Aeronautics and Space Administration (NASA) Glenn Research Center over the last 70 years. The review includes a historical perspective of the center and the facilities used to conduct the research. Major NASA noise research programs are highlighted, showing their impact on the industry and on the development of aircraft noise reduction technology. Noise reduction trends are discussed, and future aircraft concepts are presented. Results show that, since the 1960s, the average perceived noise level has been reduced by about 20 dB. Studies show that, depending on the size of the airport, the aircraft fleet mix, and the actual growth in air travel, another 15-17 dB is required to achieve NASA's long-term goal of providing technologies to limit objectionable noise to the boundaries of an average airport. [ABSTRACT FROM AUTHOR]