CEL632 Advanced Occupational Sound Level Meter

CEL620 Occupational (Basic) CEL630 Occupational CEL632 Occupational (Advanced) CEL621 Environmental (Basic) CEL631 Environmental CEL633 Environmental (Advanced)

Occupational Noise The OSHA occupational noise regulations state that you should use at least a Type 2 Sound Level Meter. The meter should be verified by a suitably equipped laboratory when new and we recommend having it checked at least every two years. You also need a Calibrator to check the meter's function before making measurements. An Integrating meter like the CEL632 provides you with the measurement of the average Slow sound level - Lavg. Rather than trying to average the sound level by eye (made more difficult by the logarithmic nature of noise), the meter does the averaging for you. The Lavg is then used to calculate the worker's Time Weighted Average (TWA) noise exposure.

Hearing Protection Assessment

When the noise levels are particularly high (e.g. greater than 95 dBA) then you should check that the hearing protection provided is adequate. If it does not reduce the noise at the ear to an acceptable level then clearly it is not adequate. The CEL632 measures both the A and C weighted sound level, so you can use the NRR or HML method - for a working example of NRR and HML methods please take a look at our Hearing Protection Calculator.

For a more detailed analysis of hearing protection, particularly when tonal noise is involved, an Octave Band analysis may be required. In this case the CEL632 can be fitted with Octave Band Filters.

 

Environmental and Community Noise

As the CEL632 is available as either Type 1 or Type 2 and includes data logging, it is suitable for many environmental noise surveys.

However, for environmental work we would recommend the CEL633 Environmental Sound Level Meter, which includes the statistical parameters (L10, L50, L90, etc.) that are often required. The CEL633 also includes the Time History and automatic timers for longer term environmental noise monitoring.