VEHICLE PRESENCE NOTIFICATION APPARATUS
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United States of America Patent
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N/A
Issued Date -
May 2, 2013
app pub date -
Oct 29, 2012
filing date -
Oct 31, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A vehicle presence notification apparatus notifying a presence of a vehicle includes a directivity speaker and a directivity controller. The directivity speaker generates a false engine sound out of the vehicle. The directivity controller controlling a directivity of the false engine sound based on a speed of the vehicle. The directivity controller controls a ratio of a high-pitched frequency component to a low-pitched frequency component in the false engine sound based on the speed of the vehicle.
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