Noise Survey Instruments
Basically, there are two different instruments to measure noise exposures: the sound level meter and the dosimeter.
Sound Level Meter (SLM)
A sound level meter is a device that measures the intensity of sound at a given moment. Since sound level meters provide a measure of sound intensity at only one point in time, it is generally necessary to take a number of measurements at different times during the day to estimate noise exposure over a workday. If noise levels fluctuate, the amount of time noise remains at each of the various measured levels must be determined.
Sound level meters can be used to:
- Spot-check noise dosimeter performance.
- Determine the employee's noise dose whenever use of a noise dosimeter is unavailable or inappropriate.
- Identify and evaluate individual noise sources for abatement purposes.
- Aid in determining the feasibility of engineering controls for individual noise sources.
- Evaluate hearing protectors.
Knowledge Check Choose the best answer for the question.
1-9. Which type of measurement instrument measures sound intensity at a given moment?
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