Abstract:An experimental system has been developed for in situ measurement of the acoustical impedance of surfaces using a single microphone, pseudorandom sequences, and transfer-function techniques. It is well known that the impedance determined from two transfer functions is very sensitive to phase errors. The biased impedance has been expressed as a function of equivalent errors [J.-F. Li and J.-C. Pascal, J. Acoust. Soc. Am. 99, 969–978 (1996)]. In the system used here only one channel is used; thus the error does … Show more
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