护听器声衰减值的3种测试方法

Three Test Methods on Measuring Noise Attenuation of Hearing Protection Devices

关于护听器声衰减能力的评价,目前有好几种方法都有大量文献充分地论证。本文介绍了3种标准化的评价方法:真耳听阈衰减法(Real-ear attenuation at threshold,REAT),真耳内置麦克风(Microphone in real ear,MIRE),和声学仿真测量装置(Acoustical test fixture,ATF)方法。讨论了评价护听器声衰减能力,这3种方法各自的优缺点和适用范围。REAT方法是评价护听器声衰减值最准确的方法之一,目前被国际标准普遍采用。

There are a number of well documented test methods to measure the noise attenuation values of hearing protection devices （HPD） . In this paper, three standardized test methods--Real-ear attenuation at threshold （REAT） , Microphone in real ear （MIRE） , and Acoustical test fixture （ATF） were briefly introduced. The advantage and disadvantage of these three test methods on being used in hearing protector attenuation measurement were discussed in this paper. REAT method has been shown to be the most accurate method at estimate the performance of hearing protectors, and has been thoroughly standardized around the world.