Silencer is one of the most commonly used silencing components.In the design of silencing compo-nents,it is often encountered that due to tight boundaries,silencer cotton will be added to the chamber of the si-lencer to form a composite silencer.However,whether the amount of silencer cotton added has an impact on transmission loss;Is the effect of different forms of sound-absorbing cotton added to the muffler consistent on transmission loss;Is the effect of adding sound-absorbing cotton on silencers with different shapes of holes con-sistent?This article analyzes the above issues through simulation calculation,experimental verification,and data comparison,and obtains the basic rules of composite silencers,providing a basis for future design work.
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