用于基底膜测量的零差干涉仪。

Homodyne interferometer for basilar membrane measurements.

作者信息

Khanna S M

出版信息

Hear Res. 1986;23(1):9-26. doi: 10.1016/0378-5955(86)90172-3.

Abstract

Techniques available for measuring the mechanical response of the inner ear are compared. These include capacitive probe, Mössbauer and interferometric methods. The theory of a homodyne interferometer utilized for inner ear measurements is given. Experimental apparatus built to test the interferometer performance is described. Experimental results show that the measuring system can detect vibrations as low as 3 X 10(-12) cm. Its frequency response is flat within 1 dB from 0.1 to 40 kHz. It has a linear dynamic range of over 90 dB. Immunity of the interferometer to various disturbances is demonstrated.

摘要

对可用于测量内耳机械响应的技术进行了比较。这些技术包括电容式探头、穆斯堡尔方法和干涉测量方法。给出了用于内耳测量的零差干涉仪的理论。描述了为测试干涉仪性能而构建的实验装置。实验结果表明，该测量系统能够检测低至3×10^(-12)厘米的振动。其频率响应在0.1至40千赫范围内，在1分贝内保持平坦。它具有超过90分贝的线性动态范围。证明了干涉仪对各种干扰的抗扰性。