Patent ID: 8830059

Claim:
A facility for monitoring a predetermined delineated monitoring area, comprising: at least one acoustic sensor arranged in the monitoring area and configured to convert an acoustic wave picked up following the occurrence of an activity in the monitoring area into an information signal; a processing device configured to receive the information signal; a system to transmit the information signal to the processing device; a system to transmit at least one alarm; and a database comprising, for each of at least one predetermined reference activity whose occurrence is likely to generate acoustic waves in the monitoring area, reference characteristics relating to said predetermined reference activity, wherein the processing device includes an analysis system configured to: analyze the information signal according to the reference characteristics of at least one predetermined reference activity of the database, and activate the system to transmit at least one alarm according to the analysis of the information signal, the monitoring area includes the at least one acoustic sensor detecting seismic waves propagating in a solid medium, the system to transmit at least one alarm includes a device, arranged in the monitoring area, to generate a level one alarm and a device to generate, to outside of the monitoring area, a level two alarm, and the analysis system is configured to receive an acknowledgment signal from a user and to: activate the device to generate the level two alarm when no acknowledgment signal is received in a predetermined time period following the generation of the level one alarm, and update the reference characteristics of a predetermined reference activity in the database when an acknowledgment signal is received in said predetermined time period following the generation of the level one alarm.