5. Conclusion

Industrialists and occupational health and safety specialists have repeatedly expressed the need for tools to solve the problem of noise emitted by compressed air-powered equipment. The difficulties stemmed from the absence of standardized, comprehensible specifications that could be used directly in industry, and that would enable the right choice of silencers to be made. In this context, and with the aim of meeting the recommendations of the Machinery and Physical Agents (Noise) Directives, the research project conducted on the acoustic characterization of silencers, and the subject of this article, has resulted in a simple methodology, based on recognized theoretical aspects and validated by numerous tests.

The aim of this methodology, which led to the international standard NF ISO 20145...

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Glossary

Bibliography

(1) - DONALDSON (C.D.), SNEDEKER (R.S.) - A study of free jet impingement. Part 1. Mean properties of free and impinging jets. - Journal of Fluid Mechanics, vol. 45, part 2, p. 281-319 (1971).
(2) - TANNA (H.K.) - An experimental study of jet noise, part 2....

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...