Noise attenuation - Cylindrical dissipative silencer with reduced pressure drop

General information relating to noise attenuation and pressure drop of dissipative silencers

Whether in the construction sector, or for industrial applications, noise attenuation in fluid networks is often achieved using dissipative silencers. The power of the sound waves is then reduced (mainly) depending on the distance traveled along their path in the open channels i.e. the airways (with on the periphery - and/or in the form of splitters - a packing of sound absorbing material) and also...

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Design calculations with SILDIS® software for mufflers with perforated pipes for gas flow noise reduction

Use of mufflers including perforated pipes to reduce gas flow noise

Mufflers including perforated pipes are used in different contexts for reducing gas flow noise (depending on the application: at ambient or variable temperature e.g. very high):

  • compressed air networks (at suction and/or discharge)
  • exhaust lines from thermal engines >depressurization vents (e.g. steam)

It is the passage of the gas flow through orifices (e.g. such as those resulting from drilling work on the...

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Acoustical sizing calculations for panels with millimetric or sub-millimetric perforations for soundproofing

Main applications of perforated acoustic panels

It is well known that perforated panels can be used as constituents of products or constructive systems for soundproofing:

  • with regard to sound absorption: for controlling the reverberation of premises (e.g. speaking and listening rooms of all kinds [1], catering areas, sports halls, offices - among which: open spaces - and industrial premises), in particular in the form of wall panels or ceiling elements or under-roof constructions...

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