Patent ID: 7450472

Claim:
A sound system deployable of land for the protection of a zone of interest against an individual or a group of individuals with hostile behavior, the sound system comprising: a set of N sound sources capable of emitting high power sounds on the zone of interest, a generator of high power electrical signals outputting N electrical signals with the same frequency, the same amplitude and in phase, starting from a single reference signal, each of the signals being sent to one of the sound sources, means for separately modifying the phase of each of the N signals sent to the sources, a computer capable of managing the system and controlling means of modifying the phase of the generated signals, means of identifying the relative positions of the different sound sources after their deployment in different locations within the zone of interest, said relative positions being calculated by the computer and used by the computer to determine the phase to be applied to each of the N signals; wherein a network of acoustic sources is created capable of sending a sound wave with an intensity that varies selectively in the zone of interest to create quiet zones in which the signal intensity is low and active zones in which the intensity of the signal is high.