| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vehicle existence notification device 1 preventing any feeling of discomfort by the notification sound to a pedestrian or the like not at a dangerous position or a person in a cabin by transmitting the notification sound for notifying the existence of a vehicle 2 only to the pedestrian or the like to whom the danger must be notified. Ž<P>SOLUTION: The vehicle existence notification device 1 has a modulation means 3 for modulating the ultrasonic wave according to the audible sound with the ultrasonic wave being a carrier wave, and a speaker 4 for generating the notification sound by emitting the modulated ultrasonic wave into the air. Thus, the modulated ultrasonic wave is modulated while advancing in the air, and converted into the audible sound. The modulated audible sound has excellent directivity similar to that of the ultrasonic wave, and the notification sound can be transmitted only to a pedestrian in a range to whom the danger must be notified. Thus, any feeling of discomfort by the notification sound is not given to a pedestrian or the like not at a dangerous position, or a person in a cabin. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
