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3. Muffler description
Silencers can be grouped into three main categories: diffusion (dissipative), expansion chamber and mixed.
3.1 Technical description of silencers
3.1.1 Diffusion silencers (dissipative)
Diffusion silencers (figure 4 ) are often small and usually made of porous materials such as sintered bronze, sintered plastic or steel wool. In some cases, they feature an internal cavity. Compressed air...
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Muffler description
Muffler characterization
Bibliography
Regulations
Directive 2006/42/EC of the European Parliament and of the Council of May 17, 2006, on machinery, and amending Directive 95/16/EC.
Directive 2003/10/EC of the European Parliament and of the Council of February 6, 2003, on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (noise).
Standards and norms
- Acoustics – Noise from machinery and equipment – Guide to using the basic standards for determining emission sound pressure levels at workstations and other specified positions. - NF EN ISO 11200 - juillet 2014
- Acoustics – Noise from machinery and equipment – Determination of emission sound pressure levels at the workstation and at other specified positions under conditions approaching those of the free field on...
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