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.
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December 2013
December 01 2013
Time and frequency metrics related to auditory masking of a 10 kHz tone in bottlenose dolphins (Tursiops truncatus)
Brian K. Branstetter;
Brian K. Branstetter
a)
National Marine Mammal Foundation
, 2240 Shelter Island Drive, No. 200, San Diego, California 92106
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Jennifer S. Trickey;
Jennifer S. Trickey
G2 Software Systems Inc.
, 4250 Pacific Highway, Suite 125, San Diego, California 92110
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Hitomi Aihara;
Hitomi Aihara
G2 Software Systems Inc.
, 4250 Pacific Highway, Suite 125, San Diego, California 92110
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James J. Finneran;
James J. Finneran
U.S. Navy Marine Mammal Program, Space and Naval Warfare Systems Center Pacific
, Code 71510, 53560 Hull Street, San Diego, California 92152
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Tori R. Liberman
Tori R. Liberman
National Marine Mammal Foundation
, 2240 Shelter Island Drive, No. 200, San Diego, California 92106
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a)
Author to whom correspondence should be addressed. Electronic mail: brian.branstetter@nmmf.org
J. Acoust. Soc. Am. 134, 4556–4565 (2013)
Article history
Received:
April 09 2013
Accepted:
September 26 2013
Citation
Brian K. Branstetter, Jennifer S. Trickey, Hitomi Aihara, James J. Finneran, Tori R. Liberman; Time and frequency metrics related to auditory masking of a 10 kHz tone in bottlenose dolphins (Tursiops truncatus). J. Acoust. Soc. Am. 1 December 2013; 134 (6): 4556–4565. https://doi.org/10.1121/1.4824680
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