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

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Dual-Ear Validation System

3M™ E-A-Rfit™ Dual-Ear Validation System utilizes science-based, quantitative testing to give accurate reports of hearing protection. The system determines personal attenuation rating (PAR) of individual workers and helps remove measurement, fitting, and spectral uncertainty.

  • Dual-element, dual-microphone assembly measures sound levels inside and outside the hearing protector
  • Fast, clear, accurate results are obtained in just seconds and can be printed or saved electronically for future reference
  • System tests across seven standard frequencies (125, 250, 500, 1000, 2000, 4000, 8000 Hz)
  • Works with a large variety of 3M Hearing Protection Products including ear plugs, banded hearing protectors and ear muffs
  • Simple, easy-to-use intuitive software
  • Includes software, speaker and impact resistant carrying case


3M™ products must be used in accordance with OSHA regulations, and the user instructions, warnings, and limitations accompanying each product.

For Use With (Equipment) Variety of 3M™ ear plugs, banded hearing protectors and ear muffs
For Use With (Application) Health and Safety Testing
Model 393-1100
Product Type Fit Test Kit