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Acoustic Guide

Speech Privacy
The next table shows you how these numbers relate to what you might hear, or not want to hear, between two rooms in an office environment.
Weighted sound reduction index
Rw
Speech Privacy Level
25 dB
Normal speech can be overheard
30 dB
Loud speech can be heard clearly
35 dB
Loud speech can be distinguished under normal conditions
40 dB
Loud speech can be heard but not distinguished
45 dB
Loud speech can be heard faintly but not distinguished
>50 dB
Loud speech can only be heard faintly with great difficulty
 

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