Reference

The labeled NRR of all 291 hearing protectors we cover, in one sortable reference: earplugs, earmuffs and banded protectors, highest rating first.

Earmuffs only deliver their rated protection when the cushions form an unbroken seal against your head. This guide shows you how to wear earmuffs correctly: positioning the headband, clearing hair and eyewear arms, setting the right tension, choosing cap-mount versus over-head styles, and knowing when worn cushions need replacing.

The NRR on every earplug and earmuff is a laboratory number, not the protection you actually get on the floor of a plant. This guide shows you how to read the NRR on the EPA label, apply the OSHA 50 percent derating rule and the NIOSH (NRR-7)/2 formula, and calculate combined attenuation when you double up earplugs and earmuffs together.

The right protector is the one a worker will actually wear all shift while still getting below 85 dBA. This guide shows you how to choose hearing protection: matching derated NRR to your noise level, comparing earplugs, earmuffs, and banded plugs, weighing comfort and communication needs, and knowing when to double up devices.

Noise exposure is not the loudest reading of the day - it is a time-weighted average of every level a worker meets. This guide shows you how to calculate noise exposure: building an 8-hour TWA, computing dose with OSHA's 90 dBA PEL and 5 dB exchange rate, comparing it to the 85 dBA action level, and where the NIOSH 3 dB rate differs.

Wearing earplugs and earmuffs together is the right call above about 100 dBA, but the protection does not add up. This guide explains dual hearing protection: when OSHA and NIOSH call for it, why combined NRR is not the sum of the two devices, how to apply the +5 dB rule, and how to combine plugs and muffs correctly.

Most foam earplug failures are insertion failures, not product failures: a plug that is not rolled thin and held until it expands seals poorly and loses much of its rated protection. This guide walks through the roll-pull-hold method, shows how to check the seal, lists the common mistakes that ruin attenuation, and covers reusable plugs.

A decibel levels chart turns noise numbers into a clear picture of when hearing damage starts and when protection becomes mandatory. This guide charts common tools and environments by dBA, lays out the OSHA 1910.95 permissible exposure limits hour by hour, and shows how to convert a noise level into the right earplug or earmuff NRR.