Modelling the acoustic transmission of biological tissue at low frequencies

J. A. Hession, B. A.O. McCormack

Research output: Contribution to journalArticlepeer-review

Abstract

Two experiments were performed to investigate the transmission of vibrations and sounds through biological tissue. In the first experiment, an oscillating probe was placed against the inner surface of a sample of abdominal wall, and the resulting vibration on the outer surface of the abdomen was monitored. In the second experiment, a vertically mounted standing tube was fitted with a loudspeaker. A slab of swine tissue, from the underbelly was placed at the opposite end to the loud speaker, directly on top of the tube. A sine wave was produced by a computerized signal generator and transmitted through the amplifier to the speaker. It was found that tissue tends to attenuate signals at frequencies up to 50 Hz, while it may dissipate signals at higher frequencies. Quantitative data indicate the rate of loss of sound passing through tissue, which is detected at increasing distance from the source of the sound.

Original languageEnglish
Pages (from-to)16-20
Number of pages5
JournalAcoustics Bulletin
Volume29
Issue number5
Publication statusPublished - Sep 2004

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