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)

Voir la formule →

Formule

## 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)** - *TL* = sound transmission loss of the wall (dB) - *A* = total absorption in the receiving room (Sabine) - *S* = area of the partition If the receiving room is very absorbent (A > S), NR exceeds TL. If it is reverberant (A < S), NR is less than TL.

Exemple Résolu

Wall TL = 45 dB, wall area = 15 m2, receiving room absorption = 30 m2 Sabine.

  1. 01NR = TL + 10 log10(A/S)
  2. 02NR = 45 + 10 log10(30/15)
  3. 03NR = 45 + 10 log10(2)
  4. 04NR = 45 + 3.01 = 48.01 dB