| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reproduce a tone color near to an actual operation sound. <P>SOLUTION: This acoustic device 1 for a vehicle includes: a control circuit 2 having a plurality of signal output parts 21a and 21b for individually outputting a plurality of acoustic component signals of becoming constant in the duty ratio and controlling a frequency of the respective acoustic component signals output from the respective signal output parts 21a and 21b; an adding circuit 4 for generating an acoustic composite signal by adding the mutual respective acoustic component signals output from the respective signal output parts 21a and 21b mutually superposing amplitude of these acoustic component signals; and an acoustic part 5 for converting the acoustic composite signal generated by the adding circuit 4 into an artificial operation sound. The control circuit 2 generates a main acoustic component signal controlled in the frequency corresponding to a main sound wave component of becoming maximum in a sound pressure level in a specific operation sound and a sub-acoustic component signal controlled in the frequency corresponding to a sub-sound wave component smaller in the sound pressure level than the main acoustic component signal in the specific operation sound, as the acoustic component signal. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
