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ACTIVE NOISE CONTROL SIMULATED NOISE AUDIO OUTPUT FOR ACTIVE NOISE CONTROL TESTING
ACTIVE NOISE CONTROL SIMULATED NOISE AUDIO OUTPUT FOR ACTIVE NOISE CONTROL TESTING
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机译：有源噪声控制模拟噪声音频输出，用于有源噪声控制测试
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摘要
A vehicle includes an engine and/or powertrain producing noise that is audible in a passenger compartment of the vehicle when the engine and/or powertrain is running. An active noise control arrangement includes a first loudspeaker disposed within a passenger compartment of the vehicle. A digital signal processor receives audio data and transmits an audio signal to the first loudspeaker dependent upon the audio data. A microphone is disposed within the passenger compartment and converts the sound from the first loudspeaker and the noise within the passenger compartment into a microphone signal. The microphone signal is transmitted to the digital signal processor, and the digital signal processor modifies the audio signal such that the audio signal attenuates the noise in the passenger compartment. A vehicle processor transmits a simulated noise signal to a second loudspeaker for use in testing effectiveness of the active noise control arrangement in attenuating noise when the engine and/or powertrain is not running and not producing noise.
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