AEROTECNICA COLTRI MCH 14 TECH NITROX SERIES, Instruction Manual, Page: 20 / 117

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3.2
Noise level
The MCH 14 TECH NITROX series of compressors have been designed and built with the objective of
reducing acoutsic pressure to a minimum.
Whenever the machines are used in environments where the daily noise level to which the operators are
exposed is higher than 80 dBA, the employer must take steps to apply all the measurements necessary
to safeguard the operator’s health. In particular, the operators must, if necessary, use all the individual
protection devices to protect themselves from the noise level.
The reading of the machine noise level was taken
from the “operator’s work place” (Fig. 16), with the
following methods and results
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Table 2
Technical characteristics
METHODS OF MEASUREMENT
ISO 3746
MCH 14 TECH NITROX
Level of acoustic pressure at the operator’s work place
Level of acoustic power
Peak level
dB(A) 75
dB(A) 97,1
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INSTRUMENTS
Bruel & Kjacr sound level integrating meter
Microphone for sound level meter
Gauge
Mod. 2231 cl. 1
Mod. 4155 cl. 1
Mod. 4230 cl. 2