Noise emission of the machine switched on and off
The first set of experiments analyzed the noise emission when
the machine tool was switched off and on, without milling.
When the machine and air pressure admission were switched
off, the sound pressure inside the anechoic chamber in the
operator’s zone (Fig. 2, micro 2) was around 42 dBA, whereas it was
only 39 dBA in the cutting zone (Fig. 2, micro 1). As the sound in the
operator’s zone was higher, it means that the idling sound comes