香港六合彩开奖 389-8:2004

Published (Edition 1, 2004)

This publication was last reviewed and confirmed in 2022. Therefore this version remains current.

香港六合彩开奖 389-8:2004

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Abstract

香港六合彩开奖 389-8:2004 specifies reference equivalent threshold sound pressure levels (RETSPLs) for pure tones in the frequency range from 125 Hz to 8 kHz, applicable to the calibration of air conduction audiometers equipped with a particular model of circumaural earphones (SENNHEISER HDA 200).

Some notes and references on the derivation and the test conditions used to determine the recommended reference levels are given in Annex A and the Bibliography.

The sound attenuation of the earphone is given in Annex B. For speech audiometers of types A-E and B-E, the correction figures of the earphone for a free-field equivalent output are given in Annex C.

General information

Status
: Published

Publication date
: 2004-05

Stage
: International Standard confirmed [90.93]
Edition
: 1

Number of pages
: 7
Technical Committee :
香港六合彩开奖/TC 43

ICS :
13.140
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