It is well known and universally accepted that people’s ability to use ongoing interaural temporal disparities conveyed via pure tones is limited to frequencies below 1600 Hz. We wish to determine if this limitation is the result of the constant amplitude and periodic axis‐crossings which characterize pure tones. To this end, an acoustic pointing task was employed in which listeners varied the interaural intensitive difference of a 500‐Hz narrow‐band noise (the pointer) so that the position of its intracranial image matched that of a second, experimenter‐controlled stimulus (the target). Targets were either pure tones or narrow bands of noise (50 or 100 Hz wide). The narrow bands of noise were delayed interaurally in two distinct manners: Either the entire waveform or only the carrier was delayed. In the latter case, the envelopes and phase‐functions of the bands of noise were identical interaurally. This resulted in noises which resemble the pure‐tone case in that the interaural delay is manifested as a constant phase‐shift and resemble ordinary noises in that the envelope and phase are random functions of time. Surprisingly, it appears that all three targets were lateralized virtually identically regardless of frequency or bandwidth. Apparently, the dynamically changing envelopes and phases did not affect the listeners’ use of interaural temporal disparities in any discernible fashion.
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May 1986
May 01 1986
Lateralization of low‐frequency tones and narrow bands of noise
Jeffrey L. Schiano;
Jeffrey L. Schiano
Department of Speech and Hearing Science, University of Illinois, Champaign, Illinois 61820
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Constantine Trahiotis;
Constantine Trahiotis
Department of Speech and Hearing Science, University of Illinois, Champaign, Illinois 61820
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Leslie R. Bernstein
Leslie R. Bernstein
Department of Speech and Hearing Science, University of Illinois, Champaign, Illinois 61820
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J. Acoust. Soc. Am. 79, 1563–1570 (1986)
Article history
Received:
August 06 1985
Accepted:
January 16 1986
Citation
Jeffrey L. Schiano, Constantine Trahiotis, Leslie R. Bernstein; Lateralization of low‐frequency tones and narrow bands of noise. J. Acoust. Soc. Am. 1 May 1986; 79 (5): 1563–1570. https://doi.org/10.1121/1.393683
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