Answer:
Step-by-step explanation:
1. OSHA sets permissible exposure limits (PELs) for noise in the workplace. The PEL for an 8-hour workday is 90 decibels (dB). This means that workers should not be exposed to noise levels exceeding 90 dB for more than 8 hours a day.
2. OSHA also uses a time-weighted average (TWA) to assess noise exposure. It calculates the average noise exposure over an 8-hour period, taking into account different noise levels throughout the day. The TWA should not exceed 90 dB.
3. OSHA recommends a system of controls to protect workers from excessive noise exposure. These controls include engineering controls (such as using quieter machinery or adding sound barriers), administrative controls (such as limiting exposure time or providing quiet areas for breaks), and personal protective equipment (such as earplugs or earmuffs).
4. OSHA also provides guidelines for shorter exposure durations. For example, the permissible exposure time decreases as the noise level increases. For noise levels of 100 dB, the recommended exposure time is limited to 2 hours per day.
5. It's important to note that noise-induced hearing loss is cumulative. Even if a person is exposed to noise levels below the OSHA limits, repeated exposure over time can still lead to hearing damage. Therefore, it is crucial to take precautions and follow the guidelines to protect hearing health.
By following OSHA guidelines and implementing appropriate measures, employers can ensure a safe working environment and protect their employees from the harmful effects of loud noise on hearing.