標準號：DIN EN ISO 389-8-2004
中文標準名稱：聲學.校準聽力設備的基準零級.第8部分:純音和環繞式耳機的基準等效閾聲壓級
英文標準名稱：Acoustics - Reference zero for the calibration of audiometric equipment - Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones (ISO 389-8:2004); German version EN ISO 389-8:2004
標準類型：A42
發布日期：1999/12/31 12:00:00
實施日期：2004/11/1 12:00:00
中國標準分類號：A42
適用范圍：This part of ISO 389 specifies reference equivalent threshold sound pressure levels (RETSPLs) for pure tonesin the frequency range from 125 Hz to 8 kHz, applicable to the calibration of air conduction audiometersequipped with a particular model of circumaural earphones (SENNHEISER HDA 200).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 inAnnex C.