3M™ E-A-Rfit™ Dual-Ear Validation System Kit (MMM-393-1100) is a fast, science-based, and objective fit-testing solution designed to help employers verify whether their workers' hearing protection is providing adequate noise attenuation. By measuring across 7 standard frequencies in under five seconds, the system determines each individual’s Personal Attenuation Rating (PAR) and delivers a clear pass/fail result. It supports improved hearing conservation programs and helps eliminate uncertainty in hearing protector fit and effectiveness.

• Objective Fit Testing: Measures the actual noise reduction for each worker using dual-microphone, dual-element technology.
• Fast and Efficient: Tests both ears simultaneously in under five seconds.
• Science-Based Measurement: Provides quantitative data across 7 standard frequencies (125, 250, 500, 1000, 2000, 4000, and 8000 Hz).
• Personalized Results: Generates a Personal Attenuation Rating (PAR) for each worker, with a clear pass/fail result.
• Improved Hearing Conservation: Helps identify incorrect fit, improper usage, or mismatched hearing protection — enhancing worker safety.
• Broad Compatibility: Works with a wide range of 3M hearing protection products, including earplugs, banded hearing protectors, and earmuffs.

• Simple Three-Step Process:
Fit – Insert test-equipped hearing protection
Test – Run the test using the dual-microphone system
Assess – Review PAR and adjust fit or product if needed

• Cloud or Local Data Storage: Save results directly to a local PC or synchronize via the optional 3M Cloud for multi-site access and backup.
• Customizable Testing Menu: Employers can tailor the list of hearing protectors available during testing.
• Reporting & Data Analysis: Export data into Excel templates for documentation, compliance, and insight into overall protection levels.
• Complete System Kit: Includes fit test software, speaker, and impact-resistant carrying case.
• Free Training & Support: Online resources and support included at no additional cost.
• Test Accessory Requirement: Requires use of probed test plugs, pods, or cushions (sold separately).