A lot depends on the specific situation, but we usually expect to achieve a 40-50dB drop with our double skin soundproof buildings. Our single skin soundproof buildings usually achieve between a 30-40dB reduction. This may vary depending on the type of frequencies that are being generated, but we can normally achieve these results under the toughest conditions.

If you bear in mind that normal conversation and outside background noise is normally around 60-70dB. We can reduce a drum kit which is around 100dB to less than background noise. If your looking for complete silence from a drumkit, or other loud, or low frequency instrument then you'll always be disappointed but we can reduce levels to acceptable levels.