标准摘要
[中文适用范围]： 指定对 ISO 389:1991（将重新发布为 ISO 389-1）中指定的级别的补充。 给出的值适用于 Etymotic Research ER-3A 型插入式耳机，通过 ER-3-14 型耳塞耦合到人耳。 [外文原描述]： Specifies levels supplementary to those specified in ISO 389:1991 (to be re-issued as ISO 389-1). Values given are applicable to insert earphones of type Etymotic Research ER-3A, coupled to the human ear by ear inserts of type ER-3-14.
英文名称Acoustics — Reference zero for the calibration of audiometric equipment — Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones