Energy label for acoustic silencers

When a silencer is required, the flow through the silencer creates a pressure drop. The pressure drop is dependent on the silencer design and depends also on the available space. Often the volume flow is defined in the specifications. This pressure drop combined with the volume flow results into energy loss. While regulations become more strict with regard to energy losses, there is no suitable guideline for energy losses in silencers. Silencers cannot simply be compared by catalogue. A silencer is related to a specific noise problem that depends on source, recipient, available space, etc. Therefore a method is required to compare the energy efficiency of silencers.A suitable method is proposed that incorporates these specifics challenges. This method, relevant parameters, and design choices for the calculation will be explained. There will also be examples to explain the relevance in of this method in some practical situations. Finally the challenges of incorporating this method, into the system efficiency as a whole are discussed.