Hearing damage happens quietly. By the time a worker notices ringing in the ears, the loss is permanent. The guides in this section explain how NRR and SNR ratings work, when earplugs beat earmuffs and when the opposite is true, and how to estimate safe exposure time at different noise levels. You will also find advice on helmet-mounted protectors for construction crews and why fit testing matters as much for hearing as it does for respirators. Hacsons has been supplying certified hearing protection across Pakistan since 1996. Browse the posts below or explore our full hearing protection range.