
Standard reference zero for the calibration of pure tone air conduction audiometers. Specification for a standard reference zero using an acoustic coupler complying with BS 4668
出版:British Standards Institution

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基本信息
標準編號: BS 2497-5:1988
發布時間:1988/2/29 0:00:00
標準類別:Standard
出版單位:British Standards Institution
標準頁數:0
標準簡介
Reference equivalent threshold sound pressure levels for two earphones, Beyer DT 48 with flat cushion and Telephonics TDH 39 with MC 41/AR cushion, in a form suitable for calibration.
標準備注
? British Standards Institution 2013
替代本標準的新標準
等同采用的國際標準
ISO 389:1991 - Identical