NOISE DECREASE APPARATUS FOR EXHAUST PIPE OF A CAR

摘要

The present invention relates to a silencer of a vehicle, in order to reduce the size of the silencer and improve the performance of the engine, the connection pipe 11 is connected to the exhaust pipe in communication with, and is mounted inside the connection pipe (11) Speaker 12 and an active noise control device 14 connected to the speaker 12 and connected to the electronic control device 13 to generate a signal, the connection pipe 11 has a cooling fin ( 11a) is formed, the speaker 12 detects the noise in the exhaust pipe (3), (4), or silencers (5), (6) and transmits a signal to the active noise control device (14), active control device An automobile which outputs a signal in which the signal inputted at (14) is 180 degrees out of phase by the electronic control device 13 to the sprinkler 12 so as to cancel the noise in the exhaust pipes 3 and 4. Noise reduction device of exhaust pipe.