Due to its inherent characteristics in reducing low frequency, small pressure loss and simple geometry, the resonant silencer is being extensively used in engine inductionnoise reduction.
The results show that the diffuser has such advantages as larger induction ratio, low resistance and noise, relatively even air supply, no condensation, simple in structure and low in costs.
测试结果表明，该风口的诱导比大，阻力小，噪声低，送风比较均匀，风口没有结露现象，结构简单，造价低。
3
In process of continuous induction heat treatment, there are heavy electromagnetic disturbance, nonlinearity. heavy noise and variable parameters. The existed methods of control are difficult.