3M 7100077867 Earplug Fit Testing System Microphone

Product Description

The 3M 7100077867 is a left and right ear microphone assembly designed for use with an earplug fit testing system. This component allows technicians and safety professionals to verify the acoustic seal and attenuation performance of earplugs worn by workers in high-noise environments. The microphone assembly connects to a compatible fit testing unit to measure real-ear attenuation at threshold, helping employers and safety officers confirm that hearing protection devices are performing as intended. The lightweight assembly weighs approximately 0.07 pounds, making it easy to handle during fit testing procedures.

This microphone assembly is used in occupational health and industrial hygiene programs where OSHA-mandated hearing conservation requires documented fit testing of hearing protectors. Typical applications include manufacturing facilities, construction sites, airports, and any workplace subject to noise exposure regulations. Safety coordinators, industrial hygienists, and occupational health nurses commonly deploy this type of assembly during employee fit testing sessions to generate quantitative fit test data.

Key Features

• Left and right ear microphone assembly for bilateral earplug fit testing
• Compatible with earplug fit testing systems requiring acoustic measurement at the ear
• Compact form factor: 5 inches length by 8 inches width by 1 inch height
• Lightweight at 0.07 pounds for easy handling during testing procedures
• Sold as a single package unit for targeted component replacement

Compatibility

Designed as a replacement or supplemental microphone assembly for earplug fit testing systems. Specific system compatibility should be confirmed against the fit testing equipment manufacturer documentation before purchase.

Installation Notes

Installation of this microphone assembly should be performed by a qualified safety professional or industrial hygienist familiar with the fit testing system in use. Ensure the fit testing unit is powered off before connecting or disconnecting the microphone assembly. Follow the system manufacturer guidelines for cable routing and connector seating to avoid signal interference during testing. Refer to applicable OSHA 29 CFR 1910.95 hearing conservation program requirements when conducting earplug fit testing.