Lexicon: S
Sound insulation
The so-called keyhole effect is of particular importance in this context. Small openings or hairline gaps in the connection area can negatively influence the sound insulation values. A reduction of the sound level by 10 dB is perceived by the human ear as a halving of the volume.
An unfilled joint has a sound insulation value of 15 dB. A mineral wool pigtail achieves approx. 35 dB, the same value is achieved by a joint filled with sealant. A compressed sealing tape achieves sound insulation values greater than 42 dB.
There are two sets of rules for the sound insulation requirements of windows, which contain the recognised rules of technology. In addition to DIN 4109 "Sound insulation in buildings", which was introduced by the building authorities, the VDI guideline 2719 "Sound insulation in buildings and their additional equipment" is also very frequently used.