Research On The Technique Of Active Acoustic Muffler Control

Forming the traveling wave in the sound tube to measure the transmission coefficient of sound samples, is a useful method. The key problem of tube measuring is how to form the traveling wave.The article uses the voltage of the main transmitting transducer excitation on the acoustic tube and the sound field data measured by the six hydrophones on the tube, to forming and solving the "transfer matrix" overdetermined equations. In order to obtain the transmitter excitation voltage when formed the traveling wave sound in the tube. Being a convenient, fast, stable active control strategy, for acoustic noise active control. To facilitate future use the acoustic tube to measure the sound samples.At the same time, in order to verify the feasibility, this paper, useing the ANSYS software, simulations the acoustic transducer and acoustic tube, the maximum to establish model, Through modeling and simulation, study and analysis on the characteristics of traveling wave sound field in the tubes under different conditions, by comparison, there is a traveling wave in the sound tube which could be used to measure the sound coefficient. It is proved that the method is feasible.