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EnglishAcoustic protection in building installations
The demands on acoustic protection are on the rise. Many building owners and inhabitants are no longer satisfied with the mere observance of minimum requirements in new buildings. Most national or local building codes also offer optional values for increased acoustic protection. A typical maximum value for noises transmitted by building installations in a neighbouring apartment may be around 30 dB(A), whereas increased acoustic protection may be around 25 dB(A).
Düker SML: The sound protection pipe
The flake-shaped graphite particles in the grey cast iron reflect sound waves again and again, so they run out of energy. Also the high specific density of the pipes – as compared with plastics – absorbs sound waves. In case of correct installation, there is no risk of loud waste water flow noises in Düker cast iron drainage pipe systems, even without additional soundproofing. The use of a special soundproof pipe of plastic does not offer any advantages over cast iron.
Airborne sound pressure level
| Flow rate | pipe brackets with rubber insert | pipe brackets with acoustic decoupler |
|---|---|---|
| 0.5 l/s | 38 dB(A) | 37 dB(A) |
| 1.0 l/s | 42 dB(A) | 43 dB(A) |
| 2.0 l/s | 45 dB(A) | 44 dB(A) |
| 4.0 l/s | 48 dB(A) | 48 dB(A) |
Structure-born sound characteristic level
| Flow rate | pipe brackets with rubber insert | pipe brackets with acoustic decoupler |
|---|---|---|
| 0.5 l/s | < 10 dB(A) | < 10 dB(A) |
| 1.0 l/s | 14 dB(A) | < 10 dB(A) |
| 2.0 l/s | 19 dB(A) | < 10 dB(A) |
| 4.0 l/s | 24 dB(A) | 11 dB(A) |
