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3M™ E-A-Rfit™ Dual-Ear Validation System

Fast, accurate, and easy. Complete your hearing conservation program with the 3M™ E-A-Rfit™ Dual-Ear Validation System.

Skip the guesswork. Get objective, personalised test results.

  • The 3M™ E-A-Rfit™ Dual-Ear Validation System makes it easy to measure every employee's unique level of protection in hearing protection fit testing and takes the guesswork out of managing compliance in your hearing conservation program.


Validate your workers’ hearing protectors in under 5 seconds.

  • The noise attenuation levels indicated on the earplugs or earmuffs may not provide adequate protection if worn incorrectly or with improper fit. The 3M™ E-A-Rfit™ Dual-Ear Validation System is based on field microphone-in-real ear (F-MIRE) technology that measures the effectiveness of hearing protectors from inside a worker’s ears, providing accurate, quantitative results.

Simple Steps in Hearing Protection Fit-Testing

  • can't get your foam ear plugs to fit? learn more about the importance of fitting your ear plugs correctly to prevent the risk of noise-induced hearing loss

    Step 1: Workers self-fit their own earplugs or earmuffs.

    In less than 5 seconds, the system generates a personal attenuation rating (PAR) that indicates a worker's noise reduction levels for a given fitting. The ratings are an accurate measurement of your workers’ hearing protectors so you can be assured they are protected.

    Advantage: Reflects an individual's fitting methods and indicates if additional training is necessary in hearing protection fit-testing.

  • learn more about the 3 steps of hearing protection fit-testing

    Step 2: Connect to the unique dual-element microphone.

    The microphone measures the noise reduction of each earplug or earmuff as worn by the worker across the wide range of industrial noise frequencies.

    Advantage: Objectively tests 7 frequencies (125 Hz - 8 kHz) in under 5 seconds per ear, so you don't rely on subjective test responses.

  • the 3m earfit dual ear validation system provides an accurate measurement of your workers' earplugs or earmuffs protection levels with a personal attenuation rating

    Step 3: Run the Test for Personal Attenuation Rating (PAR)

    Patented system and proprietary algorithms quickly analyse real-ear data to provide Personal Attenuation Rating (PAR) and fit variability.

    Advantage: PARs can assist in determining if the level of hearing protection your workers are getting is appropriate to their work environment.

    Documented Results: Easy-to-understand test results are documented for each test subject, both in print and electronic formats, for future reference.


Noise induced hearing loss is 100% preventable

View products that help you test and identify the level of noise induced hearing loss in your workplace.


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