Mobile terminal, wearable terminal, sonic distance measurement system, and sonic distance measurement method
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United States of America Patent
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Feb 5, 2019
Grant Date -
Oct 6, 2016
app pub date -
Mar 3, 2016
filing date -
Apr 3, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Disclosed herein is a mobile terminal including: a reproducing section adapted to reproduce a first distance measurement signal; a recording section adapted to record the first distance measurement signal and a second distance measurement signal output from other mobile terminal; a time difference measurement section adapted to measure a first difference between recording start times of the first and second distance measurement signals; a communication section adapted to receive a second difference between recording start times of the first and second distance measurement signals from the other mobile terminal, the second difference being measured by the other mobile terminal; and a distance calculation section adapted to calculate a distance to the other mobile terminal by multiplying the subtraction result between the first and second differences by the speed of sound.
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