ANSI-S12.42 › Complete Document History
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

Complete Current Edition:
   DOD ADOPTION - FYI ONLY: DOD ADOPTED - March 9, 2015
   2010 R20 EDITION - REAPPROVED IN 2020 - Jan. 6, 2020

Obsolete Revision Information:
   2010 EDITION - CONTINUOUS OR IMPULSIVE NOISE USING MICROPHONE-IN-REAL-EAR O - Jan. 1, 2010
   1995 EDITION - REAFFIRMED IN 2004 - Jan. 1, 1999