ISO 4869-1-1990 声学 护听器 第1部分:声衰减测量的主观法

标准号：ISO 4869-1-1990
中文标准名称：声学 护听器 第1部分:声衰减测量的主观法
英文标准名称：Acoustics; hearing protectors; part 1: subjective method for the measurement of sound attenuation
标准类型：C71
发布日期：1999/12/31 12:00:00
实施日期：1990/12/15 12:00:00
中国标准分类号：C71
国际标准分类号：13.340.20
适用范围：Specifies a method for measuring sound attenuation at the threshold of hearing. The procedure is designed to yield values close to the maximum attenuation which are not normally attained under field conditions. The values reflect the attenuating characteristics only to the extent that users wear the device in the same manner as did the test subjects. Data are collected at low sound pressure levels but which are also representative of the values at higher sound pressure levels.