3M uses cookies on this site Detailed information on cookies and their use can be found in our Privacy Policy. You can customize the cookie-related settings at any time by clicking on Cookie Preferences in the footer of this page.

By clicking "Accept and Proceed" you acknowledge that you agree to the use of cookies on your computer

Accept and Proceed

Skip to Primary Navigation Skip to Site Navigation Skip to Main Content All 3M.com Site Map

PPE Personal Safety

PPE Products
PPE Solutions
Featured Products
Safety Network Blog

3M™ E-A-Rfit™ Validation System

3M™ E-A-Rfit™ Validation System

You have offered hearing protection to your workers. Now, how do you gain confidence they are protected?

3M™ E-A-Rfit™ Validation System utilises F-Mire technology to measure the level of employee hearing protection in just 8 seconds. Workers receive their own personal attenuation rating (PAR) and learn how correctly inserting the right earplug increases their level of protection.

Play Video
Request a demo
Hearing range & services

Learn more about the 3M™ E-A-Rfit™ Validation System

System Kit

E-A-Rfit validation system includes:

  • Speaker and Stand
  • Dual –Element Microphones
  • USB Cable
  • Power Cable
  • Roll Model
  • Trial Quantity of Probed Test Plugs and Software

List of compatible 3M™ E-A-R™ Classic™, E-A-RSoft™, Yellow Neons™, UltraFit™, Push-Ins™ and Express™ Earplugs:

  • Classic earplugs - corded / uncorded
  • Classic earplugs - small
  • SuperFit 33 and SuperFit 36 earplugs
  • E-A-RSoft Yellow Neon / Solar corded / uncorded earplugs
  • E-A-RSoft FX corded / uncorded earplugs
  • UltraFit standard / Ultrafit 14 and 20 earplugs
  • Tracers standard / Tracers 20 earplugs
  • Push-Ins corded / uncorded and Express corded / uncorded earplugs

and much more to come...

Request a demo


3 Simple Steps

Step 1: Workers self-fit their own plugs
In less than 8 seconds per ear, the system generates a personal attenuation rating (PAR) that indicates a worker's noise reduction levels for a given fitting

Advantage: Reflects an individual's fitting methods and indicates if additional training is necessary.

Step 2: Connect to the Unique dual-element microphone
The microphone measures the noise reduction of each earplug as worn by the worker across the wide range of industrial noise frequencies.

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

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.


System Implementation

"Good, Better, Best"

A Program Tailored Around Your Workplace's Needs

There are 3 options for incorporating the 3M™ E-A-Rfit™ Validation System into a hearing conservation program, all designed to suit your unique needs. This hearing protector fit testing benefits everyone.

Option 1: Audit (Good)

This is the base-level application of the E-A-Rfit system, acceptable for wearers exposed to noise levels less than 85dBA.

  • Establish baseline values for new employees
  • Helps identify workers receiving inadequate protection that leaves them at risk of threshold shifts
  • Validate high protection levels required by workers in high noise areas

Fit, Train & Motivate

  • Provides tool for training proper insertion techniques and to assess proficiency
  • Motivates employees by helping them realize the control they have in protecting their hearing

Option 3: Assess & Manage Usage (Best)

For optimum precision in predicting employee protection and enhancing individual use and performance.

  • Improves long term performance of your hearing conservation program
  • Indicates employees needing further fit training or alternative hearing protectors
  • Input your noise exposure data and the 3M™ E-A-Rfit™ Software can help you identify the most appropriate hearing protector(s) and help minimize over/under protection

Request a demo


Brochure Downloads

3M™ E-A-Rfit™ Brochures

Find out more about the 3M™ E-A-Rfit™ Validation System

Validation System Brochure (PDF, 1.7MB)
Validation System Leaflet (PDF, 608kb)

Technical Support

How does it work? What is the Field Microphone In Real Ear (F-MIRE) technology? Find out more about the technology behind this solution.

The Field MIRE approach to Measuring Hearing Protector Attenuation (PDF, 2.5MB)

Tips & Tools for Fitting

Video: Premoulded earplugs
Video: Pod earplugs
Video: Roll down earplugs
Roll Down Earplugs Fitting Poster (PDF, 830 Kb)


Installation Tools

3M™ E-A-Rfit™ Installation Guides

Installation guide (Full) (PDF, 800KB)
Installation guide (Upgrade) (PDF, 500KB)

Software Download

Note: Click on the Full Installation link if you are a new user or you are running 3M™ E-A-Rfit™ Software version 3 or earlier. Click on the Upgrade Installation link if you are running version 4 or later.

Software full installation (exe, 304 MB)
Software upgrade installation (exe, 20 MB)

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 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 on this page.
  3. Contact 3M to obtain a Technician Code. Click here to create a request.

Contact us



Training Modules

3M is pleased to introduce a dynamic, new online training program to guide users of its 3M™ E-A-Rfit™ Validation System through the process of system set-up, data entry, earplug attenuation testing, and reporting.

The training consists of 7 modules and you can view them and listen to them at your leisure.

Part 1: Introduction
Part 2: Set up
Part 3: Visit creation
Part 4: Product selection
Part 5: Fitting earplugs
Part 6: Attenuation testing
Part 7: Results and reports

For any questions or for more details of 3M™ E-A-Rfit™ Validation System, please contact us.


3M™ E-A-Rfit™ Validation System

Optimal Fit

Featured Video

Optimal Fit

The 3M™ E-A-Rfit™ Validation System assists in achieving optimal fit through hearing protector selection and employee training. In less than 8 seconds per ear, the system generates a personal attenuation rating (PAR) that indicates a worker's noise reduction levels for a given fitting of a hearing protector. Compare ratings across hearing protectors and fittings to determine best fit.

Play Video

Get Objective, Personalized Results

Featured Demo

Get Objective, Personalized Results

Researchers at 3M have developed proprietary algorithms to analyse sound pressure inside ear canals. This in-the-ear testing procedure provides quantitative data. Fit, train, and motivate workers using their Personal Attenuation Rating (PAR).

Request a demo

Follow Us YouTube Twitter LinkedIn

Safety Network

Need Help?

If you have questions or want more information, please


3M webinars

Title: Part One: Noise Hazards and their effects on health
Date: 11th February 2016
Time: 2:00 - 3:00 pm

Title: Part Two: Protecting your hearing with passive HPE
Date: 23rd February 2016
Time: 12:00 - 1:00 pm

Title: Part Three: Protecting your hearing with electronic solutions
Date: 3rd March 2016
Time: 12:00 - 1:00 pm

Subscribe to our News

First Name:
Last Name:
Job Title:
Confirm Email:

The information you provide on this email form will be used to contact you regarding 3M Safety Solutions products and solutions and as further described in our Internet Privacy Policy.