The system comprises: a remote control station; a plurality of detection devices for the detection of noise which are located inside an area to be monitored; a master device adapted to receive noise level data from the detection devices and adapted to send the data to the remote control station, the master device being provided with a client communication module configured to communicate with the remote control station and with an access point communication module configured to communicate with one of the detection devices; wherein each of the detection devices is provided with a client communication module configured to communicate with the access point communication module of the master device, the detection devices and the master device being located in predetermined positions and in a substantially homogeneous manner inside said area for the detection of noise level data which are certifiable and homogeneous both in terms of spatial distribution and in terms of time distribution.