The Noise Reduction Rating, also known as the NRR, is the level of noise that hearing protection can block. NRR provides users with useful and numerically defined information to determine the hearing protection needed. The normal range of the Noise Reduction Rating is going to be around 0 to 30(+). Lab tests determine the decibel (dB) reduction that is appropriate.
While there are many types of hearing protection on the market, let's take a closer look at the main types that help keep you safe on the job. Almost everyone is familiar with traditional ear muffs or ear plugs. Brands like Howard Leight, Radians, Pyramex, and ERB have designed a wide range of quality hearing protection products.