MVA 02 rev 5 - December 2017
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CAUTION:
Vibrations and noise emission are directly correlated. Compliance with the instructions given
for correct installation so as to reduce vibrations to a minimum is of equivalent importance for
noise reduction.
Since the noise emitted by a fan can be influenced by external factors that can affect the overall noise level,
such as:
the dimensions of the environment in which the fan is installed
the presence of static elements near the fan (e.g. walls)
the presence of other machines that are also sources of noise emission
FVI
invites the user to measure ambient noise levels. It should be noted that the presence of other operating
machines generates a "superimposition of effects" and resonance that multiply ambient noise.
In addition, in cases of restricted environments, or if the fan is installed against walls, the effect of
reverberation and resonance on structures (walls and ceiling) is "exponential".
CAUTION:
Avoid positioning fans in areas that could increase the noise risk.
The definition of the risks to workers of exposure to noise is not the responsibility of
FVI
, which limits itself to
indications of values, levels of uncertainty, standards or criteria used for noise emission measurements.
As envisaged by applicable legislation, it is the user that must assess the level of exposure of operatives to
noise emissions using its own specific procedures, identifying:
sources of noise and their relative importance
average exposure times for each operative
the level of direct and reflected noise
the noise transmitted by structures and not through the air
CAUTION:
Avoid working positions that increase the noise risk for operatives.
CAUTION:
Reducing exposure times and the use of Personal Protection Equipment will reduce the risks
caused by exposure to noise emissions.
If exposure to noise, in terms of sound pressure, exceeds 80 dBA, the employer must provide operatives
with PPE for the hearing, such as earplugs or earmuffs. If exposure is equal to or higher than 85 dBA, the
employer must take all possible action to ensure that PPE for the hearing is effectively used.
CAUTION:
With sound pressures higher than 100 dBA, operatives may approach the fan only if it is not
operating, even if wearing Personal Protection Equipment.
