標(biāo)準(zhǔn)號：BS EN ISO 389-8-2004
中文標(biāo)準(zhǔn)名稱：聲學(xué).校正聽力設(shè)備的基準(zhǔn)零級.純音和環(huán)繞耳機的基準(zhǔn)等效閾聲壓級
英文標(biāo)準(zhǔn)名稱：Acoustics - Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones
標(biāo)準(zhǔn)類型：N65
發(fā)布日期：2004/6/8 12:00:00
實施日期：2004/6/8 12:00:00
中國標(biāo)準(zhǔn)分類號：N65
國際標(biāo)準(zhǔn)分類號：13.140
適用范圍：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.