FIELD: physics, signalling.
SUBSTANCE: disclosed is a method of creating unbearable mental conditions for intruders in closed premises (offices, banks, cars etc.), fitted with special-purpose locking devices. Said conditions are created by automatically turning on an ultrasonic generator, the radiation of which is directed into the interior of the premises. The ultrasonic radiation is modulated with rectangular pulses with modulation frequency of 1 Hz or higher. The pulse ratio of the ultrasonic radiation is set equal to 2. The resultant radiation pressure is equivalent to infrasound radiation. Parameters of the ultrasonic radiation and reverberation time are associated with parameters of the premises, particularly with the size and coefficient of reflection of the sound wave by walls of the premises.
EFFECT: providing higher radiation power while reducing overall dimensions of the radiator.
2 dwg, 1 tbl
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