How to Evaluate Noise Exposure
The first step toward solving any noise problem is to define it. To understand what requirements must be implemented according to OSHA's noise standard, it is necessary to determine exposure levels. If you need to raise your voice to speak to someone 3 feet away, noise levels might be over 85 decibels requiring a hearing conservation program.
The following sections provide information about evaluating noise exposure levels:
- Walk-around Survey
- Work-shift Sampling
- Instruments Used to Conduct a Noise Survey
Walk Around Survey
A walk around survey should be performed to screen for noise exposures and to determine if additional monitoring is necessary. When screening for noise exposures, sound level meter measurements and estimates of the duration of exposure are sufficient. The resulting spot readings can be used to determine the need for a more thorough evaluation.
If the results of the walk around survey indicate time-weighted average (TWA) exposures of 80 dBA or more, then additional noise monitoring should be performed.
Knowledge Check Choose the best answer for the question.
1-7. After you conduct a walk-around survey for noise levels, you determine the average noise level in a work area is 83 dBA. What should be your next action?
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