Exposure to excessive noise at work poses significant health risks for workers. These include hearing loss, tinnitus, and various other health conditions. To mitigate these risks, hearing protection devices (HPDs) such as earplugs and earmuffs are commonly used. However, the effectiveness of HPDs relies heavily on proper usage and fit. Ill-fitting earplugs are a common challenge faced by workers, compromising their ability to adequately protect their hearing. Hearing protection fit-test systems are technologies designed to measure the level of noise reduction achieved when wearing HPDs. These systems provide valuable insights into the effectiveness of different devices in attenuating or reducing
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