Airborne and Structure-Borne Sound Insulation

Graphic Airborne Sound – Sample Music Box

When it comes to machines, considering the airborne insulation often does not suffice. This is illustrated by the following example:

The music box in the illustration at the top represents our machine. When the clock mechanism is wound up, the barrel begins to turn, and the 18 pins generate a soft melody.

Due to the small geometric dimensions of the device, only a few of the oscillations are transformed into airborne sound.

Graphic Airborne Sound – Sample Music Box

The melody only becomes louder when the vibration-distributing surface is enlarged. This happens as soon as the music box is placed on a table top. The vibrations from the music box are now transmitted to the table top. This part is called structure-borne sound.

Graphic Airborne Sound – Sample Machine

Imagine that this machine is placed inside your business, causing unacceptable noise. Often the first measure to be suggested is a sound protection hood, which usually, however, has no effect whatsoever.

The reason for this is the big difference between the soft “airborne sound” and the loud “structure-borne sound”. It makes it necessary to take primary measures that reduce the loud structure-borne sound.

Reducing the structure-borne sound with an elastic bedding
Reducing the structure-borne sound with an elastic bedding

Elastic bedding with Regupol® and Regufoam®, adjusted to the machine in question, reduces the generation of the structure-borne sound.

Placing in addition a sound protection hood over the machine removes the noise problem.

If you have any further questions about this issue or wish to communicate with an expert consultant, please feel free to get in touch with us at any time.