| 摘要 |
A vehicle approach alert device includes: a sound generation output generation unit (21b) that generates a sound generation output of sound generation data read from a memory device; a voltage control unit (22) that outputs a voltage control output by changing a voltage value of an output waveform from the sound generation output; an amplifier (24) that causes a current corresponding to the voltage control output to flow through a sound generation member (3) to generate vehicle approach alert sound; an accelerator operation amount acquisition device (21c); a change amount computing device (21d) that computes an amount of temporal change in the amount of accelerator operation; a sound generation control device (21e) that, on the basis of the temporal change amount, sets an envelope frequency of the vehicle approach alert sound; and a change control device (21f) that causes the voltage control unit to change the voltage value in accordance with the envelope frequency. |
