BS EN ISO 389-8-2004 声学.校正听力设备的基准零级.纯音和环绕耳机的基准等效阈声压级

标准号：BS EN ISO 389-8-2004
中文标准名称：声学.校正听力设备的基准零级.纯音和环绕耳机的基准等效阈声压级
英文标准名称：Acoustics - Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones
标准类型：N65
发布日期：2004/6/8 12:00:00
实施日期：2004/6/8 12:00:00
中国标准分类号：N65
国际标准分类号：13.140
适用范围：This part of ISO 389 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). NOTE 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 (see IEC 60645-2), the correction figures of the earphone for a free-field equivalent output are given in Annex C.