Enhancement of the transient-evoked otoacoustic emission produced by the addition of a pure tone in the guinea pig
作者:
Robert H. Withnell,
Graeme K. Yates,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1998)
卷期:
Volume 104,
issue 1
页码: 344-349
ISSN:0001-4966
年代: 1998
DOI:10.1121/1.423243
出版商: Acoustical Society of America
数据来源: AIP
摘要:
This study examined the transient-evoked otoacoustic emission obtained in response to a click stimulus presented in combination with a pure tone in the guinea pig. Low-pass filtered click waveforms were digitally generated using asin(t)/tfunction windowed over 3 ms with an elevated cosine envelope. Transient-evoked otoacoustic emissions were obtained using the nonlinear derived response technique. Phase locked pure tones of various frequencies at∼70 dB SPLwere electrically mixed with electrical clicks, with the pure tone present only for the three lower level stimuli in the train of four stimuli. Enhancement in the amplitude of the response spectrum at frequencies which corresponded to regions of the basilar membrane apical to the tone was observed with the addition of the tone. This finding is inconsistent with the transient-evoked otoacoustic emission being the result of independent generators. It suggests that intermodulation distortion energy may contribute to the transient-evoked otoacoustic emission, the enhancement in the emission response spectrum at frequencies below the pure tone being a result of a complex interaction on the basilar membrane of intermodulation distortion products.
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