For the sound-absorbing lining of…

• shop floors
• machine and testing rooms
• shooting ranges

High quality advice is guaranteed

We provide candid advice and consulting in all aspects of sound insulation because costs of sound-absorbing lining do not always match reasonably defined benefits.

What needs to be considered?

The extent to which sound insulation helps is a function of the size of the room and its average level of sound absorption. In spaces with an alpha value (sound absorption coefficient) of over 0.15, sound insulation is not useful.  In space without a diffuse sound field an absorbing sound insulation with alpha values of under 0.15 is not useful, because, regarding range dependence of sound pressure levels, the level then drops per doubling of distances by more than 3 dB. A sound absorbing lining should at least provide an improvement of 3 dB. Furthermore it is not useful to improve the average sound absorption level by much more than 0.3. Costs of doing this are in no relation to their benefits.

Where is it useful to install sound insulation?

In sound proof cabins, in machine rooms and in plain rooms with an alpha value of approximately 0.05, sound insulation of about 20% reaps benefits of 6-7 dB. In order to bring a 3 dB change in rooms with an alpha value of 0.15, at least 20% of the surfaces need to be lined with soundproof materials. This material needs to be selected knowing the composition of frequencies of the sound which needs to be absorbed.

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