Kostenloser Noise Reduction Rechner
Berechnen Sie den noise reduction between two rooms aus transmission loss und absorption. Kostenloser acoustics Rechner.
Noise Reduction
48.01 dB
Noise Reduction vs Transmission Loss (TL)
Formel
## 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.
Lösungsbeispiel
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
Häufig Gestellte Fragen
What is transmission loss?
TL measures how well a partition blocks sound. It is the ratio of incident to transmitted power in dB. A concrete wall might have TL = 50 dB; a thin plasterboard wall about 25 dB.
Why does receiving room absorption matter?
Sound that enters the receiving room reverberates. More absorption means the energy dissipates quickly, lowering the steady-state level and increasing effective NR.
How do I improve noise reduction?
Increase the wall TL (thicker, denser, or double-leaf walls) and increase absorption in the receiving room (acoustic panels, carpet).
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