Low-frequency modulation of distortion product otoacoustic emissions in humans.

Low-frequency modulation of distortion product otoacoustic emissions in humans. Research Abstract Details 

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Low-frequency modulation of distortion product otoacoustic emissions in humans. Abstract Text:

Lin Bian,Nicole M Scherrer,Lin Bian,Nicole M Scherrer,Lin Bian,Nicole M Scherrer,

Low-frequency modulation of distortion product otoacoustic emissions (DPOAEs) was measured from the human ears. In the frequency domain, increasing the bias tone level resulted in a suppression of the cubic difference tone (CDT) and an increase in the magnitudes of the modulation sidebands. Higher-frequency bias tones were more efficient in producing the suppression and modulation. Quasi-static modulation patterns were derived from measuring the CDT amplitude at the peaks and troughs of bias tones with various amplitudes. The asymmetric bell-shaped pattern resembled the absolute value of the third derivative of a nonlinear cochlear transducer function. Temporal modulation patterns were obtained from inverse FFT of the spectral contents around the DPOAE. The period modulation pattern, averaged over multiple bias tone cycles, showed two CDT peaks each correlated with the zero-crossings of the bias tone. The typical period modulation pattern varied and the two CDT peaks emerged with the reduction in bias tone level. The present study replicated the previous experimental results in gerbils. This noninvasive technique is capable of revealing the static position and dynamic motion of the cochlear partition. Moreover, the results of the present study suggest that this technique could potentially be applied in the differential diagnosis of cochlear pathologies.

Low-frequency modulation of distortion product otoacoustic emissions in humans. Publishing Authors By Initials

L Bian,NM Scherrer,L Bian,NM Scherrer,L Bian,NM Scherrer,

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Low-frequency modulation of distortion product otoacoustic emissions in humans. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of the Acoustical Society of America

VOLUME: 122

Page Numbers: 1681

Journal Abbreviation: J. Acoust. Soc. Am.

ISSN: 1520-8524

DAY: 11

MONTH: Sep

YEAR: 2007

Low-frequency modulation of distortion product otoacoustic emissions in humans. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Low-frequency modulation of distortion product otoacoustic emissions in humans.

AFFILIATION: Auditory Physiology Laboratory, 3430 Coor Hall, Department of Speech and Hearing Science, Arizona State University, Tempe, Arizona 85287-0102.

Country: United States

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MEDLINETA: J Acoust Soc Am

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