Measurements of Basilar-membrane Vibrations by a Laser Doppler Vibrometer.

DOI 7 Citations 14 References Open Access

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  • レーザードップラー振動計による基底板振動の計測

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Although amplitude of the tympanic membrane vibrations is very few in nanometer when we make conversations, we can understand clearly what the other one says. This is speculated to be caused by the cochlear amplification. Otoacoustic emissions (OAEs) are recognized as the byproduct of this cochlear amplification, however, the mechanism of amplification in the cochlea is obscure. Therefore, in the present study, a laser Dopplar vibrometer coupled to a compound microscope was used for the measurement system. Then, an attempt was made to measure directly the basilar membrane vibrations of the cochlea of guinea pigs in live, ded and hypoxic conditions, and also when distortionproduct OAEs (DPOAEs) were generated. The results were as follows: the amplification of the basilar membrane vibration, which represented the cochlear amplifier in the live guinea pigs, was influenced by the moderate hypoxic, and contributed to the generation of DPOAEs.

Journal

  • AUDIOLOGY JAPAN

    AUDIOLOGY JAPAN 38 (4), 305-312, 1995

    Japan Audiological Society

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