| Summary: | 碩士 === 國立彰化師範大學 === 車輛科技研究所 === 104 === Exhaust sound is one of the most important part in car. It also representes the car performance. The sound quality is very important for the exhaust sound. Exhaust sound from a car cannot be changed after manufacture. Therefore this study investigates the performance of active sound design for modulating the original exhaust sound to the desired exhaust sound. The basic principle of this is to make use of one or two microphones to acquire the original exhaust sound.
Then the exhaust sound is fed into the controller, which calculates the optimal signal for the input to the secondary source. The secondary source produces the optimal sound to the desired exhaust sound.
The results showed that the exhaust sound for corona could be modulated to that for yaris, civic, 320I, tiida and corolla. The objectives of sound design are to customize the sound at the tailpipe according to specific sound effect requirements. The sound at the tailpipe could be modulated in accordance with driving conditions from comfortable to sporty driving.
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