What does the Noise Reduction Rating (NRR) represent?

The Noise Reduction Rating (NRR) represents an attenuation value determined under lab conditions. This rating is measured in a controlled environment to assess how much sound can be reduced by hearing protection devices, such as earplugs or earmuffs. The NRR provides a standardized way to compare the effectiveness of different hearing protection products, ensuring that users can make informed choices based on reliable laboratory testing.

The process involves specific protocols for testing, where the device's ability to block or reduce noise is rigorously evaluated. As a result, the NRR value is a critical component in determining how much protection a specific device offers against harmful noise levels. Regulations regarding hearing conservation often utilize the NRR to guide appropriate selection and use of hearing protection in various occupational settings.