Free Noise Reduction Calculator
Calculate the noise reduction between two rooms: NR = TL + 10 * log10(A_receiver / S_wall), where TL is the transmission loss of the partition.
dB
m2
m2 Sabine
Noise Reduction
48.01 dB
Noise Reduction vs Transmission Loss (TL)
Noise Reduction Between Rooms
The noise reduction (NR) is the actual level difference between two rooms separated by a partition.
Formula
NR = TL + 10 log10(A / S)
If the receiving room is very absorbent (A > S), NR exceeds TL. If it is reverberant (A < S), NR is less than TL.
Example Calculation
Wall TL = 45 dB, wall area = 15 m2, receiving room absorption = 30 m2 Sabine.
- 01NR = TL + 10 log10(A/S)
- 02NR = 45 + 10 log10(30/15)
- 03NR = 45 + 10 log10(2)
- 04NR = 45 + 3.01 = 48.01 dB
Frequently Asked Questions
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