Designed to reduce aircraft engine noise for airport ground support crews as well as aircraft maintenance and technical personnel, the NoiseBuster Active Noise Reduction (ANR) Safety Earmuff combines an ANSI-rated 26NRR passive earmuff with active noise reduction electronics that deliver up to an additional 20 db of low-frequency noise attenuation.
Powered by a AA battery, the earmuff is resistant to water, moisture, contaminants, mechanical shock, and vibration. Perfect for users who do not mechanical shock, and vibration. Perfect for users who do not require two-way communications capability but who can benefit from protection.
Passive noise cancellation, 26 NRR, CSA Class A, SLC(80), 29.2 Class 5
ANR performance up to 20dB in 20Hz to 800Hz
These are very comfortable, and work well. I was on a project working next to a 7000 cubic inch engine wearing 30db ear muffs that were uncomfortable, and gave me a headache. I ordered these, and had them delivered the next day. These were a huge improvement. I had everyone on the project try them out. Everyone wanted a pair. Money well spent.