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Journal of the Acoustical Society of America

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Dec 1971

Volume 50, Issue 6B, pp. 1475-1562

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Comments on “Correspondence between Cochlear Microphonic Sensitivity and Behavioral Threshold in the Cat” [G. R. Price, J. Acoust. Soc. Amer. 49, 1899–1901 (1971)]

Peter Dallos

J. Acoust. Soc. Am. Volume 50, Issue 6B, pp. 1554-1554 (1971); (1 page)

Online Publication Date: 11 Aug 2005

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It is argued that the apparent covariance of cochlear microphonic (CM) and behavioral sensitivity is a result of the common dependence of both upon the middle‐ear transmission characteristics and not an indication of the causal role of CM in hearing.

Comment on “Proposed Explanation of Synchrony of Auditory‐Nerve Impulses to Combination Tones” [E. de Boer, P. Kuyper, and G. Smoorenburg, J. Acoust. Soc. Amer. 46, 1579–1581(L) (1969)]

J. L. Hall

J. Acoust. Soc. Am. Volume 50, Issue 6B, pp. 1555-1556 (1971); (2 pages)

Online Publication Date: 11 Aug 2005

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Interval histograms are computed from a threshold‐crossing model for auditory‐nerve activity. The calculations do not resemble real nerve histograms measured for combination‐tone frequencies. It appears unlikely that a threshold‐crossing model can explain the synchrony of auditory‐nerve impulses to combination tones.

Temporary Threshold Shifts Produced by Pure Tones and by Noise in the Absence of an Acoustic Reflex

John H. Mills and David J. Lilly

J. Acoust. Soc. Am. Volume 50, Issue 6B, pp. 1556-1558 (1971); (3 pages)

Online Publication Date: 11 Aug 2005

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Six subjects with an acoustic reflex and six subjects without an acoustic reflex were exposed on separate occasions to a 710‐Hz pure tone and to a ⅛‐oct band noise with an upper cutoff frequency of 710 Hz. Both exposures were 10 min at 110 dB sound‐pressure level. Temporary threshold shift (TTS) was measured at 1000 Hz. For the subjects with an acoustic reflex, the pure‐tone exposure produced 10 dB more TTS2 than the noise exposure. However, for the subjects without an acoustic reflex, the pure‐tone exposure and the noise exposure produced the same amounts of TTS. These results support the hypothesis that low‐frequency pure tones produce more TTS than low‐frequency bands of noise because of the differential effects of the acoustic reflex in responding to these two types of sounds.

Inhibition in the Auditory Nerve?

G. Moushegian, A. L. Rupert, R. D. Stillman, and I. P. Weiss

J. Acoust. Soc. Am. Volume 50, Issue 6B, pp. 1558-1560 (1971); (3 pages)

Online Publication Date: 11 Aug 2005

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Some recent findings from auditory nerve studies are considered as evidence for primary afferent inhibition.

Location of Slope Discontinuities in Glottal Pulse Shapes during Vocal Fry

S. L. Hamlet

J. Acoust. Soc. Am. Volume 50, Issue 6B, pp. 1561-1562 (1971); (2 pages)

Online Publication Date: 11 Aug 2005

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Comparison of the speech waveform with ultrasonic signals from the larynx recorded simultaneously gives information about the temporal properties of the glottal source. Physiological information obtained with this technique corroborates the time relationships between speech output and excitation waveform found with inverse filtering.
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