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3M™ E-A-Rfit™ User Support

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The 3M™ E-A-Rfit™ Validation System allows you to identify the amount of protection that a worker is receiving from their hearing protector. The purpose of this information is to provide training and software resources for users of the system. See Getting Started below.

List of Test Plugs for North America (PDF 129KB)

User Support Resources

Getting Started

In order to use the 3M™ E-A-Rfit™ Validation System to measure hearing protector attenuation, you will need to:

  1. Purchase a 3M™ E-A-Rfit™ Kit model 393-1000 from your 3M distributor. This kit includes the E-A- Rfit hardware and accessories you need to get started along with a sample of probed test earplugs. Once you begin using the system, you will need to purchase additional probed test earplugs for use during testing.
  2. Download the current version of the 3M™ E-A-Rfit™ Software and the installation guide using the links in the Installation Guide & Software Downloads section.
  3. 3M Technician Code Request.


There are currently no announcements.

Installation Guides & Software Downloads

Installation Guides
3M™ E-A-Rfit™ Installation Guide - Full (PDF 756KB)

Software Downloads
Note: Click on the Full Installation link if you are a new user or you are running E-A-Rfit software version 3 or earlier.

3M™ E-A-Rfit™ Software Installation - Full (EXE 299MB)


Technical Support Documents

Reprint of an invited peer-reviewed paper, from a 2011 special issue of Noise & Health, that examines and validates the technology behind F-MIRE measurements of hearing protector attenuation. Click here to access the entire Noise & Health issue.

Reprint of a peer-reviewed paper, from the December 2014 issue of Workplace Health & Safety, that reports the results of field research using the 3M™ E-A-Rfit™ Validation system. Click here to access the Workplace Health & Safety issue.

Contact Us for Technical Support

Contact Us. Most messages are answered within two business days or less; however, some replies require further investigation or clarification.

If you need technical assistance by telephone, please call 1-800-243-4630 then select menu options 1-2-5.

Third-Party Validation

Calibration & Repair of 3M™ E-A-Rfit™ Systems

Calibration Policies for 3M™ E-A-Rfit™ Validation Systems (PDF 30KB)
3M™ E-A-Rfit™ Repair Service Guide (PDF 28KB)

US Customers:
If you wish to request service and/or repair of your 3M™ E-A-Rfit™ Equipment, please contact 3M Detection Calibration and Repair at 1-800-245-0779, ext. 5 to reach our Repair and Calibration Department.

Outside US Customers:
Please contact your local 3M Technical Service person to coordinate the service or repair.

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Need Help?

If you have questions or want more information, please contact us.

Where to buy 3M PPE Safety Products. Pricing is available from your local 3M authorized safety distributor.



Hearing Loss Prevention Seminar

Nashville, TN

Date of Event: April 28, 2015
Details | Register


AIHce 2015

Salt Lake City, UT

Date of Event: May 30, 2015 - June 4, 2015

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