These reduce sound penetration at sound-emitting components such as fans, filters, piping, drive units, etc. Insulation is achieved through encapsulation in the widest sense of the word: For example, using insulating cabins, housings, insulating shells, or the insulation of pipelines and the filter housing.
They are used when openings to noise-emitting components cannot be avoided. This is the case in gas streams in pipelines, for example. Pipe silencers and baffle silencers are used. Usually they are based on installing absorber material in a silencer casing – the absorber material has a porous structure that absorbs the sound energy. Resonant absorbers are a special form of silencer that are the preferred choice for low-frequency noise.
Structure-borne sound attenuation measures
These measures include vibration dampers, pipeline compensators and panel resonators in fans.