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Convention Paper

Impulse Measurement of Acoustic Impedance

Authors: Merhaut, Josef

AES Convention 82 · Paper 2453 · March 1987

Abstract

An electrostetic transducer fed by voltage rectenguler pulses is used as the acoustical source transmitting acoustic volume velocity to the measured acoustic impedance Zax. The sound pressure pulses p(t) are measured and by a FFT processor their spectrum is obtained. (Repeated due to S/N ratio.) This process is undertaken first on a cylindrical waveguide and then on the unknown Zax. The differnce of both curves - logarithmically displayed - gives the normalized value of Zax. Examples of the results of measurement of acoustic impedance are given.

Details

Published in
AES Convention 82
AES Convention
82
Paper number
2453
Publication date
March 6, 1987
Session subject
Acoustics
Affiliation
Technical University of Prague, Prague, Czechoslovakia (See document for exact affiliation information.)
Type
Convention Paper