Auditory enhancement of changes in spectral amplitude
作者:
Quentin Summerfield,
Andrew Sidwell,
Tony Nelson,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1987)
卷期:
Volume 81,
issue 3
页码: 700-708
ISSN:0001-4966
年代: 1987
DOI:10.1121/1.394838
出版商: Acoustical Society of America
数据来源: AIP
摘要:
An auditory enhancement effect occurs when one component of a harmonic series is omitted for a few hundred milliseconds and then reintroduced: The reintroduced harmonic stands out perceptually. Three experiments are reported that studied a version of this effect in which several components of a harmonic series are enhanced to define the formants of a vowel. Using the accuracy of vowel identification to measure the prominence of the formant peaks in the effective auditory representation, forms of the effect were identified that are qualitatively similar to the incremental and decremental responses seen in primary auditory‐nerve fibers. These results are compatible with an origin for the enhancement effect in peripheral auditory adaptation. However, an additional mechanism is required to account for the demonstration [Viemeister and Bacon, J. Acoust. Soc. Am.71, 1502–1507 (1982)] that enhancement can involve a true gain in the frequency region of the reintroduced component. These effects demonstrate one way in which the auditory system may attenuate the prominence of background noises while preserving the ability to represent changes in spectral amplitude produced by newly arriving signals.
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