ATIS Telecom Glossary
Friday, August 22, 2014

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dB(A)
dB of sound volume in relation to 20 micropascal weighted, simulating human ear sensitivity at 40 phon level. Note 1: 20 micropascal is the human hearing threshold, i.e., 0 dB(A). Note 2: Sound volumes louder than dB(A) are represented by a graduated scale: dB(B), dB(C), and dB(D). Note 3: This scale is widely used in occupational safety and hearing protection measurements.

 

 

 

 

 

 

 

 

 

 



 
These definitions were prepared by ATIS Committee PRQC
 
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