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Clinical evaluation of a new hearing aid anti-cardioid directivity pattern.
Clinical evaluation of a new hearing aid anti-cardioid directivity pattern.
- Source :
-
International journal of audiology [Int J Audiol] 2011 Apr; Vol. 50 (4), pp. 249-54. Date of Electronic Publication: 2011 Jan 27. - Publication Year :
- 2011
-
Abstract
- Objective: The purpose of this research was to evaluate a new directional hearing aid algorithm which automatically adapts to an anti-cardioid pattern in background noise when a speech signal originates from behind the hearing aid user.<br />Design: Using the hearing-in-noise-test (HINT) in the soundfield, with the sentences delivered adaptively from the back (180°) and the standard HINT competing noise from the front (0°; 72 dB SPL), the participants were tested for three different hearing aid conditions: omnidirectional, conventional adaptive directional, and adaptive directional with the anti-cardioid algorithm enabled.<br />Study Sample: Adults (n = 21) with bilaterally symmetrical downward sloping sensorineural hearing loss; experienced hearing aid users and aided bilaterally for experimental testing.<br />Results: Results revealed a significant effect for the hearing aid microphone setting (p < .0001), with a HINT mean RTS of 4.2 dB for conventional adaptive directional, -0.1 dB for omnidirectional, and -5.7 dB when the anti-cardioid algorithm was active. This was a large effect size (Cohen's f2).<br />Conclusion: The findings suggest that the signal classification system steered the algorithm correctly, and that when implemented, the anti-cardioid polar pattern resulted in an improvement in speech recognition in background noise for this listening situation.
- Subjects :
- Acoustic Stimulation
Aged
Aged, 80 and over
Audiometry, Pure-Tone
Auditory Threshold
Female
Hearing Loss, Sensorineural psychology
Humans
Male
Middle Aged
Noise adverse effects
Perceptual Masking
Persons with Hearing Disabilities psychology
Psychoacoustics
Recognition, Psychology
Speech Reception Threshold Test
Algorithms
Correction of Hearing Impairment psychology
Hearing Aids
Hearing Loss, Sensorineural rehabilitation
Persons with Hearing Disabilities rehabilitation
Signal Processing, Computer-Assisted
Speech Perception
Subjects
Details
- Language :
- English
- ISSN :
- 1708-8186
- Volume :
- 50
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- International journal of audiology
- Publication Type :
- Academic Journal
- Accession number :
- 21271803
- Full Text :
- https://doi.org/10.3109/14992027.2010.547992