Time and frequency metrics related to auditory masking of a 10 kHz tone in bottlenose dolphins (Tursiops truncatus)

Metrics related to the frequency spectrum of noise (e.g., critical ratios) are often used to describe and predict auditory masking. In this study, detection thresholds for a 10 kHz tone were measured in the presence of anthropogenic, natural, and synthesized noise. Time-domain and frequency-domain m...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2013-12, Vol.134 (6), p.4556-4565
Main Authors: Branstetter, Brian K, Trickey, Jennifer S, Aihara, Hitomi, Finneran, James J, Liberman, Tori R
Format: Article
Language:English
Subjects:
Acoustic Stimulation
Acoustics
Animals
Audiometry, Pure-Tone
Auditory Perception
Auditory Threshold
Bottle-Nosed Dolphin - physiology
Bottle-Nosed Dolphin - psychology
Female
Models, Statistical
Noise - adverse effects
Perceptual Masking
Psychoacoustics
Signal Detection, Psychological
Signal Processing, Computer-Assisted
Sound Spectrography
Time Factors
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Summary:Metrics related to the frequency spectrum of noise (e.g., critical ratios) are often used to describe and predict auditory masking. In this study, detection thresholds for a 10 kHz tone were measured in the presence of anthropogenic, natural, and synthesized noise. Time-domain and frequency-domain metrics were calculated for the different noise types, and regression models were used to determine the relationship between noise metrics and masked tonal thresholds. Statistical models suggested that detection thresholds, masked by a variety of noise types at a variety of noise levels, can be explained with metrics related to the spectral density of noise and the degree to which amplitude modulation is correlated across frequency regions of the noise. The results demonstrate the need to include time-domain metrics when describing and predicting auditory masking.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.4824680