3M 7000009667 Listen-only Earmuffs 21 Db Nrr Foam Cushion

Product Description

The 3M 7000009667 is a listen-only passive earmuff from the 3M Optime series, designed to deliver consistent hearing protection across multiple wear positions. Rated at 21 dB NRR in both the behind-the-neck and under-the-chin configurations, this earmuff offers flexible deployment for workers who cannot use the standard over-head band position due to hard hats, hoods, or other PPE. The cups are molded from ABS plastic in a beige and black finish, and the cushion material is foam for a reliable acoustic seal. The headband is constructed from stainless steel. Weighing 0.485 pounds, the unit is suited for extended wear in moderate-noise environments.

This earmuff is intended for use in industrial, construction, and trade settings where ambient noise levels require hearing protection but workers also need to monitor radio or verbal communication. The listen-only function makes it a practical choice for trades coordinating on job sites, including HVAC installation crews, electrical contractors, and plumbing teams working in loud mechanical spaces. The over-head band position is the primary wear style, with behind-the-neck and under-the-chin configurations available for compatibility with additional head-worn PPE.

Key Features

• 21 dB NRR rating in over-head, behind-the-neck, and under-the-chin band positions
• Listen-only design allows monitoring of radio or verbal communication without removing the earmuff
• ABS cup construction in beige and black for high-visibility identification on site
• Foam cushion provides a conforming acoustic seal for consistent attenuation
• Stainless steel headband for durability in demanding work environments
• Part of the 3M Optime earmuff series

Compatibility

Designed as an OEM-style replacement and standard-use earmuff within the 3M Optime series for workers requiring passive listen-only hearing protection in moderate-noise industrial and trade environments.

Installation Notes

No installation is required for this PPE item. Fitting should be performed according to the employer hearing conservation program and OSHA 29 CFR 1910.95 guidelines where applicable. Inspect cushions and cups before each use for cracks, deformation, or compression loss that could reduce the rated attenuation. Replace cushions or the full unit when sealing integrity is compromised.