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2. Fundamentals of acoustics
2.1 The sound
Acoustics involves wave phenomena and vibration mechanics. Sound is in fact a pressure wave resulting from the successive compression and decompression of the medium in which it propagates (figure 1 ). In the case of air, a vibrating source sets nearby gas molecules in motion, and this motion is transmitted to successive layers of air. Atmospheric pressure oscillates around 10 5...
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Fundamentals of acoustics
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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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