Dba correction factors

1. How is sound dBA calculated?
2. Should I use A or C weighting?
3. What is frequency weighting A & C?
4. What the reasons are for having the dBA and dBC decibel scales?

How is sound dBA calculated?

The simplest way to do this is to use the formula 10 ^(L/10) where L is the value in each cell. Now we add all of these values together, log this value and multiply it by 10 to give the final dB(A) value.

Should I use A or C weighting?

Although the A-Weighted response is used for most applications, C-Weighting is also available on many sound level meters. C Weighting is usually used for Peak measurements and also in some entertainment noise measurement, where the transmission of bass noise can be a problem.

What is frequency weighting A & C?

Measurements made using A-weighting are usually shown with dB(A) to show that the information is 'A' weighted or, for example, as LAeq, LAFmax, LAE etc. 'C' Frequency Weighting. This is a standard weighting of the audible frequencies commonly used for the measurement of Peak Sound Pressure level.

What the reasons are for having the dBA and dBC decibel scales?

Because hazardous workplace noise is typically loud, it make sense to measure it in dBC. Several of hearing conservation's key documents (including OSHA's Hearing Conservation Amendment, and EPA's labeling requirements for hearing protectors) rely on dBC in determining noise exposures.