Artificial ear for telephonometric measurements

Details Artificial ear for telephonometric measurements Artificial ear for telephonometric measurements

H - Electricity

04

R

324/36, 349/80

H04R 29/00 (2006.01) H04R 1/22 (2006.01)

Patent

CA 1100621

ABSTRACT This invention relates to an artificial ear which has been designed for telephone use so as to exactly reproduce the conditions of acoustical load present during a usual telephone call and to take into account the charac- teristics of a sound source produced by a microtelephone. This invention provides an artificial ear for telephononmetric measurements comprising a microphone and an acoustical network consisting of an entrance cavity housing the micro- phone and of a set of further cavities communicating with the first cavity, wherein said acoustical network is structured in such a way as to reproduce at the entrance of the microphone the same impedance as the acoustic impedance presented by the human ear at a telephone receiver under usual conditions, with acoustical leakage between the outer rim of the ear and the receiver.

298428

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