Muffler is a device that allows air flow through, but can prevent or reduce sound transmission. It is an important measure to eliminate aerodynamic noise.Mufflers can block the propagation of sound waves and allow air flow to pass through. They are effective tools for controlling noise.There are many kinds of silencers, but their silencing mechanism can be divided into six main types, namely resistive silencers, reactive silencers, impedance composite silencers, micro perforated plate silencers, small hole silencers and active silencers.
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