Noise suppression unit

A noise suppression unit configured to reduce noise generated by gas flow, the suppression unit comprising:

• a body including opposing end plates that defines a hollow interior space;
• an inlet port attached to one of said end plates and an outlet port attached to another of said end plates;
• a central passage structure including a plurality of sides that extend from said inlet port to said outlet port in said interior space of said body, each of said plurality of sides having a length;
• a primary absorbing member positioned directly on an outer surface of each of said plurality of sides of said central passage structure along the entirety of said length of said plurality of sides;
• a space formed between each of said primary absorbing members and said central passage structure, and said body;
• a secondary absorbing member filling an entirety of said space formed between said body and said central passage structure and said primary absorbing members, wherein said secondary absorbing member is out of contact with said plurality of sides of said central passage structure, wherein said primary absorbing members and said secondary absorbing member are different, and wherein said primary absorbing members and said secondary absorbing member are positioned adjacent to each other and said secondary absorbing member is between each of said primary absorbing members on said outer surface of each of said plurality of sides,
• wherein sound waves generated by the gas flow pass through the central passage structure and the and the secondary absorbing member to reduce the sound waves and thereby the noise generated by the gas flow.

A noise suppression unit configured to reduce noise generated by gas flow, the suppression unit comprising:

• a body including an inlet port and an outlet port;
• a central passage structure including at least two sides, said at least two sides extending from said inlet port to said outlet port of the body, each of said at least two sides having a length;
• a first absorbing material member contacting an outer surface of each of said at least two sides of said central passage structure along the entirety of said length of said at least two sides;
• at least one additional first absorbing material member contacting the first absorbing material member;
• and
• a second absorbing material member between said body and said central passage structure, said second absorbing material member being between each of the first absorbing material members on each of said at least two sides of said central passage structure, where said second absorbing material member is out of contact with said at least two sides of said central passage structure, and where said first absorbing material members and the second absorbing material member are different,
• wherein sound waves generated by the gas flow passes through the central passage structure and the first absorbing material members and the second absorbing material member to reduce the sound waves and thereby the noise generated by the gas flow.