| 摘要 |
PROBLEM TO BE SOLVED: To use a speaker of a vehicle approach notification device mounted on a vehicle to negate the sound leaking to outside the vehicle.SOLUTION: When a vehicle 1 is stopping, a sound leak prevention device 30 generates a negating sound signal in which a phase of an acoustic signal of acoustic equipment 20 is reversed, and the negating sound signal is output as negating sound from a speaker 13 of a vehicle approach notification device 10, in order to negate the sound that acoustic signals output by in-vehicle speakers 24, 25 leak to outside the vehicle 1. When the vehicle 1 starts to move, the vehicle approach notification device 10 outputs notification sound from the speaker 13. |
