ASA S12.42-2010
在使用耳中扩音器和固定物声音程序的连续或脉冲噪声中听力保护设备的插入损耗的测量法
American National Standard Methods for the Measurement of Insertion Loss of Hearing Protection Devices in Continuous or Impulsive Noise Using Microphone-in-Real-Ear or Acoustic Test Fixture Procedures