Journal of Shanghai Jiaotong University ›› 2016, Vol. 50 ›› Issue (02): 200-203.

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Vibration Characteristics of Cochlear Basilar Membrane in Guinea Pig

TA Na1,XU Lifu1,RAO Zhushi1,HUANG Xinsheng2,ZHOU Lei2   

  1. (1. Institute of Vibration, Shock and Noise, State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China; 2. Department of EarNoseThroat, Zhongshan Hospital, Fudan University, Shanghai 200032, China)
  • Received:2014-12-19 Online:2016-02-29 Published:2016-02-29

Abstract: Abstract: In order to study the auditory mechanism of the guniea pig cochlea, the stapes footplate (SF) and basilar membrane (BM) velocity responses to pure tone were measured using a laser Doppler velocimetry which was able to measure subnanometer vibration from the middle ear and cochlea of the guinea pig. The BM velocity was measured by a reflective microbeads placed onto the scala tympani surface of the BM. The velocity response of the SF was also tested, allowing the calculation of a BM transfer function. The transfer function shows typical tuning features. For a given BM location, the characteristic frequency (CF) of the BM was about 11 kHz. The results show that frequency selectivity and travelling wave exist in the BM.

Key words: Key words: guinea pig, stapes, cochlea, Doppler laser, auditory mechanism; vibration characteristics

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