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ANSI/ASA S12.42-2010 (R2020)
American National Standards Institute/Acoustical Society of America (ANSI/ASA)
Title

"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"

Description

This standard specifies microphone-in-real-ear (MIRE) methods for the measurement of the insertion loss of active and passive circumaural earmuffs, helmets, and communications headsets, and specifies acoustic test fixture (ATF) methods for the measurement of the insertion loss of active and passive earplugs, earmuffs, helmets, and communications headsets.

Standard Type(s)
Test Method

A definitive procedure that produces a test result: Examples of test methods include, but are not limited to: identification, measurement, and evaluation of one or more qualities, characteristics, or properties. A precision and bias statement shall be reported at the end of a test method.

Personal Protective Equipment
Hearing Protection

All equipment and/or accessories (whether or not detachable) designed and manufactured specifically to protect the ears and ear canal from decibel limits put forth by OSHA. This includes all equipment warn inside or over the ear.

  • Hearing protectors
Hazards
Physical
  • Noise
  • Physical
Standard References
Referenced Standard

ANSI/ASA S12.6-2016 (R2020) - Methods for Measuring the Real-Ear Attenuation of Hearing Protectors

Conformity Assessment Notes

Various Tests and Inspections required as specified in the document.

Comments

Additional References:

  • ANSI S1.1, American National Standard Acoustical Terminology
  • ANSI/ASA S1.11-2004 (R2009), American National Standard Specification for Octave-Band and Fractional-Octave-Band Analog and Digital Filters
  • ANSI/ASA S3.20, American National Standard Bioacoustical Terminology
  • ANSI/ASA S3.25, American National Standard for an Occluded Ear Simulator
  • ANSI S3.36-1985 (R2006), American National Standard Specification for a Manikin for Simulated insitu Airborne Acoustic Measurements
  • ANSI/ASA S12.6-2008, American National Standard Methods for Measuring the Real-Ear Attenuation of Hearing Protectors
  • ANSI/ASA S12.68-2007, American National Standard Methods of Estimating Effective A-Weighted Sound Pressure Level When Hearing Protectors are Worn
  • ASTM D2240–05, Standard Test Method for Rubber Property—Durometer Hardness
  • IEC 61094-4, Measurement microphones - Part 4: Specifications for working standard microphones.
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