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no abstract available, + ID der Publikation: hslu_89278 + Art des Beitrages: Wissenschaftliche Medien + Jahrgang: 2022 + Sprache: Englisch + Letzte Aktualisierung: 2022-04-12 15:57:36

no abstract available, + ID der Publikation: hslu_89278 + Art des Beitrages: Wissenschaftliche Medien + Jahrgang: 2022 + Sprache: Englisch + Letzte Aktualisierung: 2022-04-12 15:57:36

no abstract available, + ID der Publikation: hslu_89278 + Art des Beitrages: Wissenschaftliche Medien + Jahrgang: 2022 + Sprache: Englisch + Letzte Aktualisierung: 2022-04-12 15:57:36

Psychoacoustic laboratory investigations of annoyance from prolonged exposure to environmental noise stimuli may require that subjects are engaged in a cognitive task while being exposed to the noise. This setup for collecting subjective annoyance represents a so-called unfocused listening experiment. Thereby, annoyance ratings would be collected after noise playback. Finding appropriate tasks, however, can be challenging. Firstly, doing a monotonous task for prolonged periods of time could be tiresome. Secondly, learning effects due to repetition(s) may bias the results. Hence, it is desirable to incorporate similar tasks of comparable difficulty, that can be used interchangeably, and the performance of which should not be affected by noise differently. The objective of the present study was to test whether different versions of the so-called Stroop task fulfill these requirements. In two pilot experiments, several variations of the Stroop task were tested regarding the two criteria of task similarity and comparable difficulty. Based on the results, two types of Stroop task were selected for the main experiment. Here, subjects were seated in a genuine office repurposed for this experiment, whilst performing the different versions of the Stroop task in three sound conditions: silence (LAeq = 26 dBA), low-level background sound of birds and vegetation (LAeq = 32 dBA), and road traffic noise superimposed on the mentioned background sound (LAeq = 45 dBA). Reaction times and error rates were measured. After the experiment, subjects were asked which sounds they found the least and the most annoying. Although no significant differences were found in Stroop task performance between the three sound conditions, annoyance judgements differed: road traffic noise was found to be more annoying than silence or background sound. We conclude that the chosen versions of the Stroop task are suitable for unfocused listening experiments on annoyance., + ID der Publikation: hslu_91026 + Art des Beitrages: Wissenschaftliche Medien + Sprache: Englisch + Letzte Aktualisierung: 2024-05-16 10:13:39

Psychoacoustic laboratory investigations of annoyance from prolonged exposure to environmental noise stimuli may require that subjects are engaged in a cognitive task while being exposed to the noise. This setup for collecting subjective annoyance represents a so-called unfocused listening experiment. Thereby, annoyance ratings would be collected after noise playback. Finding appropriate tasks, however, can be challenging. Firstly, doing a monotonous task for prolonged periods of time could be tiresome. Secondly, learning effects due to repetition(s) may bias the results. Hence, it is desirable to incorporate similar tasks of comparable difficulty, that can be used interchangeably, and the performance of which should not be affected by noise differently. The objective of the present study was to test whether different versions of the so-called Stroop task fulfill these requirements. In two pilot experiments, several variations of the Stroop task were tested regarding the two criteria of task similarity and comparable difficulty. Based on the results, two types of Stroop task were selected for the main experiment. Here, subjects were seated in a genuine office repurposed for this experiment, whilst performing the different versions of the Stroop task in three sound conditions: silence (LAeq = 26 dBA), low-level background sound of birds and vegetation (LAeq = 32 dBA), and road traffic noise superimposed on the mentioned background sound (LAeq = 45 dBA). Reaction times and error rates were measured. After the experiment, subjects were asked which sounds they found the least and the most annoying. Although no significant differences were found in Stroop task performance between the three sound conditions, annoyance judgements differed: road traffic noise was found to be more annoying than silence or background sound. We conclude that the chosen versions of the Stroop task are suitable for unfocused listening experiments on annoyance., + ID der Publikation: hslu_91026 + Art des Beitrages: Wissenschaftliche Medien + Sprache: Englisch + Letzte Aktualisierung: 2024-05-16 10:13:39

Psychoacoustic laboratory investigations of annoyance from prolonged exposure to environmental noise stimuli may require that subjects are engaged in a cognitive task while being exposed to the noise. This setup for collecting subjective annoyance represents a so-called unfocused listening experiment. Thereby, annoyance ratings would be collected after noise playback. Finding appropriate tasks, however, can be challenging. Firstly, doing a monotonous task for prolonged periods of time could be tiresome. Secondly, learning effects due to repetition(s) may bias the results. Hence, it is desirable to incorporate similar tasks of comparable difficulty, that can be used interchangeably, and the performance of which should not be affected by noise differently. The objective of the present study was to test whether different versions of the so-called Stroop task fulfill these requirements. In two pilot experiments, several variations of the Stroop task were tested regarding the two criteria of task similarity and comparable difficulty. Based on the results, two types of Stroop task were selected for the main experiment. Here, subjects were seated in a genuine office repurposed for this experiment, whilst performing the different versions of the Stroop task in three sound conditions: silence (LAeq = 26 dBA), low-level background sound of birds and vegetation (LAeq = 32 dBA), and road traffic noise superimposed on the mentioned background sound (LAeq = 45 dBA). Reaction times and error rates were measured. After the experiment, subjects were asked which sounds they found the least and the most annoying. Although no significant differences were found in Stroop task performance between the three sound conditions, annoyance judgements differed: road traffic noise was found to be more annoying than silence or background sound. We conclude that the chosen versions of the Stroop task are suitable for unfocused listening experiments on annoyance., + ID der Publikation: hslu_91026 + Art des Beitrages: Wissenschaftliche Medien + Sprache: Englisch + Letzte Aktualisierung: 2024-05-16 10:13:39

Besides the commonly considered time-averaged noise exposure metrics such as the Lden, additional indicators(e.g., maximum level, eventfulness, or relative quiet time) might improve the prediction of noise annoyance.An experiment was carried out on the effects of relative duration of quiet periods on annoyance reactions tohelicopter noise scenarios, with the relative duration being the ratio of total duration of quiet periods in a soundscenario to its total duration. Recorded flybys were spatially reproduced with a hemispherical loudspeaker arrayin the laboratory. Ninety-second noise scenarios were prepared, containing two, three, four, or five flybys.All scenarios exhibited the same Leq of 66.5 dB(A), however, differed in the number of flight events and theexposure levels of individual flybys. Subjects were asked to make paired comparisons (i.e., two-alternativeforced choices) for three pairs of scenarios. In each pair, one scenario had a larger number of flybys than theother; i.e., 4 vs. 2, 5 vs. 2, or 5 vs. 3. An analysis of the data of 56 subjects was carried out to investigate theeffect of the relative duration of quiet periods between events on annoyance. The results indicate that longerquiet periods may mitigate noise annoyance., + ID der Publikation: hslu_91027 + Art des Beitrages: Wissenschaftliche Medien + Jahrgang: 2019 + Sprache: Englisch + Letzte Aktualisierung: 2022-06-29 13:53:52

Besides the commonly considered time-averaged noise exposure metrics such as the Lden, additional indicators(e.g., maximum level, eventfulness, or relative quiet time) might improve the prediction of noise annoyance.An experiment was carried out on the effects of relative duration of quiet periods on annoyance reactions tohelicopter noise scenarios, with the relative duration being the ratio of total duration of quiet periods in a soundscenario to its total duration. Recorded flybys were spatially reproduced with a hemispherical loudspeaker arrayin the laboratory. Ninety-second noise scenarios were prepared, containing two, three, four, or five flybys.All scenarios exhibited the same Leq of 66.5 dB(A), however, differed in the number of flight events and theexposure levels of individual flybys. Subjects were asked to make paired comparisons (i.e., two-alternativeforced choices) for three pairs of scenarios. In each pair, one scenario had a larger number of flybys than theother; i.e., 4 vs. 2, 5 vs. 2, or 5 vs. 3. An analysis of the data of 56 subjects was carried out to investigate theeffect of the relative duration of quiet periods between events on annoyance. The results indicate that longerquiet periods may mitigate noise annoyance., + ID der Publikation: hslu_91027 + Art des Beitrages: Wissenschaftliche Medien + Jahrgang: 2019 + Sprache: Englisch + Letzte Aktualisierung: 2022-06-29 13:53:52

Besides the commonly considered time-averaged noise exposure metrics such as the Lden, additional indicators(e.g., maximum level, eventfulness, or relative quiet time) might improve the prediction of noise annoyance.An experiment was carried out on the effects of relative duration of quiet periods on annoyance reactions tohelicopter noise scenarios, with the relative duration being the ratio of total duration of quiet periods in a soundscenario to its total duration. Recorded flybys were spatially reproduced with a hemispherical loudspeaker arrayin the laboratory. Ninety-second noise scenarios were prepared, containing two, three, four, or five flybys.All scenarios exhibited the same Leq of 66.5 dB(A), however, differed in the number of flight events and theexposure levels of individual flybys. Subjects were asked to make paired comparisons (i.e., two-alternativeforced choices) for three pairs of scenarios. In each pair, one scenario had a larger number of flybys than theother; i.e., 4 vs. 2, 5 vs. 2, or 5 vs. 3. An analysis of the data of 56 subjects was carried out to investigate theeffect of the relative duration of quiet periods between events on annoyance. The results indicate that longerquiet periods may mitigate noise annoyance., + ID der Publikation: hslu_91027 + Art des Beitrages: Wissenschaftliche Medien + Jahrgang: 2019 + Sprache: Englisch + Letzte Aktualisierung: 2022-06-29 13:53:52