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RESEARCH PAPERS: Noise Control and Acoustics

Automated Noninvasive Motion Measurement of Auditory Organs in Fish Using Ultrasound

[+] Author and Article Information
M. Cox, P. H. Rogers

The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332

J. Vib., Acoust., Stress, and Reliab 109(1), 55-59 (Jan 01, 1987) (5 pages) doi:10.1115/1.3269395 History: Received August 01, 1986; Online November 23, 2009

Abstract

A scanning underwater, ultrasonic system has been developed to measure the in vivo vibrational amplitude response of fish hearing organs to low-frequency sound. The fish is insonified with a 20-MHz source while stimulated in a single-frequency sound field. Spectral analysis of the echoes due to the acoustic impedance mismatches at the auditory organs provides the desired amplitude information. A computer-controlled scanning system allows nearly simultaneous measurements of the response of the various organs. The system is capable of measuring displacements of 12Å with a spatial resolution of 0.28 mm.

Copyright © 1987 by ASME
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