CHAPTER 2 – Safety information
Chap. 2
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2.7.5 Noise hazards typical of the wood industry
The wood processing industry is traditionally characterized by processes that create high noise exposure
levels, due to a series of concomitant factors, such as the use of tools that have an elevated noise force
concentrated in work environments that are often tight. The work logistics typical of wood-working shops,
where the interchangeability of the tasks and the variable equipment use times are standard working
conditions, do not permit calculating worker exposure to noise in a precise manner.
By way of example, the noise emission values for the machine during a work cycle are provided below:
material: beech elements, rough worked, average thickness 25mm
machining: milling and tenoning
tools: HM hard metal milling cutter, 10mm diameter
HM hard metal milling cutter, 18mm diameter
Milling cutter for tenoning
Rough-milling cutter; 30mm diameter
Measured without the use of a dust removal system.
NOISE EMISSION VALUE
Background noise
68.5 dB(A)
Empty run 74.6 dB(A)
Work run 78.8 dB (A)
During machining, especially when the tool enters the materials, noise peaks up to 109.8 dB (A) were
reached.
The above-mentioned noise values are emission values and not necessarily safe working levels.
While there is a correlation between emission levels and exposure levels, it may not be used reliably to
determine whether or not additional precautions are required.
Factors affecting the actual worker exposure level include:
• Duration of exposure,
• Environment conditions,
• Other noise sources, such as for example the number of machines are other machining work in
the vicinity.
Furthermore, permitted exposure levels may vary from one country to another.
The information provided herein is nevertheless sufficient to allow machine users to better assess risks
and hazards.
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