ISO/TR 4869-4-1998 声学 护听器 第4部分:与电平有关声音恢复耳罩的有效声压级的测量

标准号：ISO/TR 4869-4-1998
中文标准名称：声学 护听器 第4部分:与电平有关声音恢复耳罩的有效声压级的测量
英文标准名称：Acoustics - Hearing protectors - Part 4: Measurement of effective sound pressure levels for level-dependent sound-restoration ear-muffs
标准类型：C73
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：C73
国际标准分类号：13.340.20
适用范围：This Technical Report specifies a physical test method for level-dependent sound-restoration ear-muffs. The physical measurements are made with the acoustic test fixture (ATF) according to ISO/TR 4869-3 or with a suitable head and torso simulator (HATS) with a suitable acoustic isolation (see clause 7). The results of these tests in combination with the results from the ISO 4869-1 tests can be used to estimate the effective A-weighted sound pressure level when sound restoration ear-muffs are worn. The method described is not suitable for measurement of the effective sound pressure level under ear-muffs in the case of impulsive noise nor for active noise reduction ear-muffs.