What's a good sound environment?  Noise should be dampened to such an extent that it no longer interferes with the activity you were set out to do. Read more... Insufficient sound proofing Inside buildings, the recommended maximum average for indoor background noise levels is 35 dB (A).  Read more... Traffic noise According to the WHO about 40% of the population in the EU are exposed to road traffic noise exceeding 55 dB(A) during daytime. More than 30% are exposed at night. Read more... Rockwool solutions Rockwool provide a range of different sound improving solutions. Read more...