Apparatus for producing sound effect for mobile object
AssigneeHonda Motor Co., Ltd.
InventorsYasunori Kobayashi, Toshio Inoue, Akira Takahashi, Kosuke Sakamoto
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Abstract
Gain characteristics depending on the frequency of a reference signal from speakers to a passenger position in a motor vehicle, i.e., gain characteristics which are an inversion of vehicle cabin sound field characteristics, are set in a first acoustic corrector. At the passenger position, a gain characteristic curve that is flat at various frequencies is achieved to prevent gain peaks and dips from occurring at the passenger position. A sound effect generated at the passenger position is made linear depending on the state of a noise source, or more specifically, a noise source caused by an accelerating action on the motor vehicle.
Claims10
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 of harmonics 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;
- and
- output means for converting said control signal into a sound effect and outputting the sound effect,
- wherein said acoustic control means has a first acoustic corrector for correcting said reference signal depending on the engine rotation frequency to generate said control signal, said first acoustic corrector having gain characteristics represented by an inversion of gain characteristics which change depending on the frequency of said reference signal from said output means to a passenger position.
Dependencies are inferred from the claim text.