Interaural Time Sensitivity Dominated by Cochlea-Induced Envelope Patterns

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Interaural time sensitivity dominated by cochlea-induced envelope patterns.

To localize sounds in space, humans heavily depend on minute interaural time differences (ITDs) generated by path-length differences to the two ears. Physiological studies of ITD sensitivity have mostly used deterministic, periodic sounds, in which either the waveform fine structure or a sinusoidal envelope is delayed interaurally. For natural broadband stimuli, however, auditory frequency sele...

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Sensitivity to interaural time differences (ITDs) conveyed in the temporal fine structure of low-frequency tones and the modulated envelopes of high-frequency sounds are considered comparable, particularly for envelopes shaped to transmit similar fidelity of temporal information normally present for low-frequency sounds. Nevertheless, discrimination performance for envelope modulation rates abo...

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Interaural time differences (ITDs) are important cues for mammalian sound localization. At high-frequencies, sensitivity to ITDs, which are conveyed only by the envelope of the waveforms, has been shown to be poorer than sensitivity to ITDs at low-frequencies, which are conveyed primarily by the fine-structure of the waveforms. Recently, human psychophysical experiments have demonstrated that s...

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ژورنال

عنوان ژورنال: The Journal of Neuroscience

سال: 2003

ISSN: 0270-6474,1529-2401

DOI: 10.1523/jneurosci.23-15-06345.2003