Patent ID: 7876913
Filing Date: 2011-01-25
Classification: G10K

Abstract:
1. A mobile object sound effect producing apparatus comprising: a waveform data table for storing waveform data in one cyclic period; reference signal generating means for generating a reference signal, which includes a harmonic signal, based on an engine rotation frequency by successively reading the waveform data from said waveform data table; acoustic control means for generating a control signal based on said reference signal; output means for converting said control signal into a sound effect and outputting the sound effect; a frequency change detector for determining a frequency change per unit time of said engine rotation frequency; and a sound pressure adjuster for correcting said control signal according to gain characteristics depending on said frequency change, and outputting the corrected control signal to said output means, wherein said gain characteristics of said sound pressure adjuster are set to a constant gain when said frequency change is not greater than a predetermined value.