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Shyamla Narayan. Alberto Recio. Ed Overstreet. Andrei Temchin. Burt Evans. Laboratory for Hearing Biology (~1996). Laboratory for Hearing Biology (today). Luis Robles. Jon Siegel. Andrei Temchin. Yun-Hui Fan. Qin Gong. Yi-Bo Fan.

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Andrei Temchin

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Shyamla Narayan

Alberto Recio

Ed Overstreet

Andrei Temchin

Burt Evans

Laboratory for Hearing Biology (~1996)


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Laboratory for

Hearing Biology (today)

Luis Robles

Jon Siegel

Andrei Temchin

Yun-Hui Fan

Qin Gong

Yi-Bo Fan


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AT THE BASE OF THE COCHLEA, BASILAR-MEMBRANE RESPONSES TO CHARACTERISTIC-FREQUENCY TONES GROW AT HIGHLY COMPRESSIVE RATES (e.g., 0.2 dB/dB)

chinchilla

guinea pig

cat


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COMPRESSIVE NONLINEARITY IN

BASILAR-MEMBRANE RESPONSES

TO CLICKS


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IN SPITE OF THE PROMINENT

NONLINEARITIES OF BASILAR-MEMBRANE

VIBRATIONS, THE FOURIER SPECTRA OF

RESPONSES TO CLICKS MATCH, LEVEL

BY LEVEL, THE RESPONSES TO TONES


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GROWTH OF PEAKS IN RESPONSES TO

CLICKS AS A FUNCTION OF STIMULUS

LEVEL


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COMPRESSIVE NONLINEARITY IS

PRESENT WITHIN A SINGLE PERIOD

OF RESPONSE OSCILLATION


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IN THE CHINCHILLA, BASILAR-MEMBRANE

RESPONSES ARE MORE SHARPLY TUNED

AND EXHIBIT GREATER NONLINEARITY

AT THE BASE OF THE COCHLEA THAN AT

THE APEX


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Compression and other nonlinearities of BM

responses probably arise in nonlinear transduction

in outer hair cells

Cooper, 2003


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RESPONSES OF AUDITORY-NERVE FIBERS

EXHIBIT AN INTENSITY-DEPENDENT PHASE

SHIFT THAT IS NOT PRESENT IN BASILAR-

MEMBRANE RESPONSES


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SECOND-ORDER WIENER KERNELS OF

AUDITORY-NERVE FIBERS RESPONSES

TO NOISE


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FRONT, GROUP AND FILTER DELAYS


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MAP OF DELAYS FOR

THE CHINCHILLA COCHLEA


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COMPARISON OF GROUP DELAYS OF

BASILAR-MEMBRANE VIBRATIONS AND

STIMULUS-FREQUENCY OTOACOUSTIC

EMISSIONS (SFOAEs)


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BASILA-MEMBRANE RESPONSES AT

THE BASE OF THE COCHLEA ARE NOT

MINIMUM-PHASE

Original responseMinimum-phase version

(time domain)

44 dB SPL

104 dB SPL


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BASAL RESPONSES ARE NOT MINIMUM-PHASE

44 dB SPL104 dB SPL

(frequency domain)


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THE MEASURED PHASE SHIFTS AS A FUNCTION

OF GAIN ARE MUCH SMALLER THAN

EXPECTED FROM MINIMUM-PHASE BEHAVIOR


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EVEN POST-MORTEM RESPONSES

ARE NOT MINIMUM-PHASE


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BASILAR-MEMBRANE RESPONSES AT THE

APEX OF THE COCHLEA ARE NOT MINIMUM-PHASE


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DEVELOPMENT OF BASILAR-MEMBRANE

VIBRATIONS IN NEW-BORN GERBILS:

RUDIMENTARY TRAVELING WAVE


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POST-MORTEM BASILAR-MEMBRANE

RESPONSES IN ADULT GERBIL ARE NOT

MINIMUM-PHASE


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BUT IN-VIVO BASILAR-MEMBRANE RESPONSES

IN IMMATURE COCHLEAE ARE MINIMUM-PHASE


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