FIELD: calculating; counting.
SUBSTANCE: invention relates to the computer equipment. Plurality of converters located at appropriate preset points in the vehicle is actuated to generate a plurality of corresponding tonal signals. Plurality of corresponding time differences between the generation time of each corresponding tone signal by the corresponding transducer and the time of detection of the tone signal by the portable device is determined. Location of portable device is determined based on differences in time.
EFFECT: technical result consists in possibility of determining location of portable device in vehicle.
20 cl, 8 dwg
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