The primary function of HPDs is to reduce the noise level reaching the ears to prevent hearing loss.
Using both earplugs and earmuffs together, known as double protection, generally offers the highest NRR and the best protection in extremely noisy environments.
If the hearing protection is uncomfortable, the employee should be provided with different types or sizes of HPDs to ensure a proper and comfortable fit.
HPDs should be inspected before each use to ensure they are in good condition and provide the necessary protection.
The NRR is a rating that indicates how much noise reduction a hearing protection device provides.
