3M Peltor Optime 105 Over-the-Head Earmuffs, H10A – NRR 30 dB Industrial Hearing Protection

The 3M Peltor Optime 105 Over-the-Head Earmuffs (Model H10A) represent the highest tier of passive hearing protection in the 3M Peltor Optime series, delivering a Noise Reduction Rating (NRR) of 30 dB as rated per ANSI S3.19-1974. These earmuffs are engineered for use in the most demanding high-noise environments where eight-hour time-weighted average (TWA) exposures reach up to 105 dBA — a specification that makes them appropriate for heavy industrial, construction, and military-grade applications.

The Optime 105's hallmark feature is its double-shell earcup technology, in which two nested cups are connected by a foam inner layer to dramatically improve attenuation across the full frequency spectrum, including challenging low-frequency noise sources such as heavy machinery, generators, and explosives. The over-the-head steel headband provides a stable, pressure-balanced seal with broad-spectrum foam cushions. Durable ABS construction withstands the rigors of daily industrial use. Compatible with helmet-attachment and behind-the-head variants for use with hard hats. Tested to ANSI S12.6-1997 (R2002) Method B, which provides a field-realistic attenuation estimate.

Government use cases include DOD and military firing range operations, Army Corps of Engineers and Navy construction battalion (Seabees) field operations, airport maintenance and flight-line operations for transportation agencies, heavy equipment and compactor operations in public works departments, and industrial maintenance shops in federal manufacturing facilities and government-operated correctional facilities. Hearing conservation programs under OSHA 29 CFR 1910.95 require engineering controls and appropriate hearing protection when TWA exposures exceed 85 dBA — the Optime 105 provides a substantial engineering and administrative control margin.

Prospect Industrial Supplies LLC (UEI: MA5HJB5E1ZR5 | CAGE: 9WTY5 | DLA CAGE: 9WTY501) supplies ANSI-rated hearing protection to DOD installations, federal agencies, and public works departments. Available in single-unit and case quantities for institutional hearing conservation programs. Compliant with OSHA 29 CFR 1910.95 Hearing Conservation Standard requirements.