| 摘要 |
The invention relates to a device and a method used to cancel the noise in an exhaust gas channel (110) of a vehicle. A noise signal is received from the exhaust gas channel (110), using a sound sensor (116), a frequency signal which has same amplitude as of noise signal but opposite phase, is generated, the generated frequency signal is acoustically mixed with the noise signal in the exhaust gas channel, using a sound converter (114), there by reducing the noise in the exhaust gas channel. Also based on the received sound signal the temperature in the exhaust gas channel is calculated.
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