Binaural processing of noisy stimuli: Internal/external noise ratios for diotic and dichotic stimuli

Ronald A. Siegel, H. Steven Colburn

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20 Scopus citations

Abstract

A set of ten digitized statistically similar Gaussian maskers was used in one-internal tone-in-noise detection experiments under diotic (NoSo) and dichotic (NoSp) interaural conditions. Stimulus/response matrices were generated for each masker in the presence or absence of a target 500-Hz tone. For both NoSo and NoSπ, nonparametric analyses show that response probabilities and sensitivities vary significantly across noise waveforms, indicating a considerable external noise component in subject response variability. A parametric model is developed that maps individual stimulus waveforms onto a decision axis, facilitating evaluation of internal/external noise variance ratios. For both NoSo and NoSπ, internal and external noise variance are of similar magnitude.

Original languageEnglish (US)
Pages (from-to)2122-2128
Number of pages7
JournalJournal of the Acoustical Society of America
Volume86
Issue number6
DOIs
StatePublished - Dec 1989

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