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AS 1591.4-1974 PDF
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Acoustics – Instrumentation for audiometry – A mechanical coupler for calibration of bone vibrators used in hearing aids and audiometers standard by Standards Australia, 11/01/1974
Specifies the instrumentation of a mechanical coupler in order that comparisons between response characteristics of bone vibrators of similar pattern may be carried out. These should closely compare with the values obtained on human mastoids with the same vibrators.
