Auditory subliminal message system and method

Details Auditory subliminal message system and method Auditory subliminal message system and method

H - Electricity

04

R

349/26

H04R 3/00 (2006.01) H04R 3/12 (2006.01)

Patent

CA 1194207

AUDITORY SUBLIMINAL MESSAGE SYSTEM AND METHOD Abstract of the Disclosure Ambient audio signals from the customer shopping area within a store are sensed and fed to a signal processing circuit that produces a control signal which varies with variations in the ampli- tude of the sensed audio signals. A control cir- cuit adjusts the amplitude of an auditory sublimi- nal anti-shoplifting message to increase with increasing amplitudes of sensed audio signals and decrease with decreasing amplitudes of sensed audio signals. This amplitude controlled subliminal message may be mixed with background music and transmitted to the shopping area. To reduce dis- tortion of the subliminal message, its amplitude is controlled to increase at a first rate slower than the rate of increase of the amplitude of ambient audio signals from the area. Also, the amplitude of the subliminal message is controlled to decrease at a second rate faster than the first rate with decreasing ambient audio signal amplitudes to mini- mize the possibility of the subliminal message becoming supraliminal upon rapid declines in ambient audio signal amplitudes in the area. A masking signal is provided with an amplitude which is also controlled in response to the amplitude of sensed ambient audio signals. This masking signal may be combined with the auditory subliminal message to provide a composite signal fed to, and controlled by, the control circuit.

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