Note: | 1. Once noise exposures are brought below 90 dBA TWA8, no further reduction is required. However, further reduction of noise may reduce the need for other hearing loss prevention requirements. |
2. Controls that eliminate noise at the source or establish a permanent barrier to noise are typically more reliable. For example: | |
a. Replacing noisy equipment with quiet equipment. | |
b. Using silencers and mufflers. | |
c. Installing enclosures. | |
d. Damping noisy equipment and parts. | |
3. Other controls and work practices may also be useful for reducing noise exposures. Examples include: | |
a. Employee rotation. | |
b. Limiting use of noisy equipment. | |
c. Rescheduling work. |