The effect of signal-temporal uncertainty on detection in bursts of noise or a random-frequency complex

This study examined the effect of signal-temporal uncertainty on detection of a 120-ms, 1-kHz tone in the presence of a continuous sequence of 120-ms bursts of either a broadband noise or a random-frequency, two-tone complex. Using the method of constant stimuli, signal-temporal uncertainty was defi...

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Bibliographic Details
Published inThe Journal of the Acoustical Society of America Vol. 124; no. 5; p. EL321
Main Authors Bonino, Angela Yarnell, Leibold, Lori J
Format Journal Article
LanguageEnglish
Published United States 01.11.2008
Subjects
Auditory Perception
Noise
Perceptual Masking
Sound Spectrography
Uncertainty
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Summary:This study examined the effect of signal-temporal uncertainty on detection of a 120-ms, 1-kHz tone in the presence of a continuous sequence of 120-ms bursts of either a broadband noise or a random-frequency, two-tone complex. Using the method of constant stimuli, signal-temporal uncertainty was defined as the difference in threshold across temporally uncertain and temporally defined listening conditions. Results indicted an average effect of signal-temporal uncertainty of 2 dB for the noise masker compared to 9 dB for the random-frequency, two-tone masker. These results suggest that signal-temporal uncertainty may be more detrimental for conditions in which informational masking dominates performance.
ISSN:1520-8524
DOI:10.1121/1.2993745