We make a comparison in tailpipe noise between straight pipe and muffler, it is seen that there is a sharp peak in low frequent.
通过直管噪声与带消声器的尾管声压级的对比，发现在低频段有一峰值。
2
With the noise legislation being strict, it is becoming more important for the design of automobile intake muffler.
随着汽车噪声控制法规的日益严格，开发适合车用的进气消声器变得愈加重要。
3
By analyzing the exhaust noise frequency spectrum and the exhaust noise control methods, the muffler is considered a effective way of controlling exhaust noise.