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Analysis of the passive damped oscillation of the guinea pig stapes

Published online by Cambridge University Press:  23 February 2015

T Yasui ,
M Ohashi ,
N Matsumoto  and
S Komune
T Yasui
Affiliation:
Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
M Ohashi
Affiliation:
Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
N Matsumoto*
Affiliation:
Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
S Komune
Affiliation:
Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
*
Address for correspondence: Nozomu Matsumoto, Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku Fukuoka 812-8582, Japan Fax: +81 92 642 5685 Phone: +81 92 642 5668 E-mail: matunozo@med.kyushu-u.ac.jp
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Abstract

Objective:

To investigate the characteristic physical properties of the oscillating system in the intact middle ear using a high-speed camera.

Design:

We analysed the oscillation of the guinea pig stapes using a high-speed camera. The specimens were prepared so that the middle-ear structures were intact. Tones of various frequencies were delivered into the external auditory canal.

Results:

We found that the stapes showed a damped oscillation after the sound stimulation had stopped. The damped oscillation after the sound stimulation showed a specimen-specific frequency that was independent of the frequency of the stimulating sound. An injury to the bony labyrinth, which removed most of the mass from the oscillating system, attenuated the damped oscillation. Therefore, this damped oscillation is likely a passive motion, rather than a reverberation of the stimulating sound.

Conclusion:

Analysing the passive damped oscillation may reveal the characteristic physical properties of the oscillating system in the near-intact middle ear. Further refinement of this simple and straightforward system may enhance basic and clinical research on the middle ear in a more intuitive way.

Keywords

High-speed CameraEar OssiclesEar MiddleBone Conduction
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 129 , Issue S2 , March 2015 , pp. S2 - S5
Copyright
Copyright © JLO (1984) Limited 2015 

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References

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