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2. Glasspack - Wikipedia

   en.wikipedia.org/wiki/Glasspack

   This lower flow but slightly quieter design approach is commonly used in glasspack mufflers. Some modern muffler designs are similar in principle to the glasspack, but use more sophisticated sound-absorbing materials such as stainless steel mesh, and more advanced acoustic engineering, reducing noise while retaining the power-preserving ...

3. Muffler - Wikipedia

   en.wikipedia.org/wiki/Muffler

   Silencer (silver) and exhaust pipe on a Ducati motorcycle A silencer cut open to show the insulation, chambers and piping inside the shell. A muffler (North American and Australian English) [1] or silencer (British English) is a device for reducing the noise emitted by the exhaust of an internal combustion engine—especially a noise-deadening device forming part of the exhaust system of an ...

4. Noise regulation - Wikipedia

   en.wikipedia.org/wiki/Noise_regulation

   A "quiet zone" sign, indicating that "no person operating any vehicle within the zone shall sound the horn or other warning device of the vehicle, except in an emergency" [1] Noise regulation includes statutes or guidelines relating to sound transmission established by national, state or provincial and municipal levels of government.

5. Monro Muffler Brake - Wikipedia

   en.wikipedia.org/wiki/Monro_Muffler_Brake

   The company was founded by Charles J. August in 1957, originally as a franchise of another company, Midas Muffler. [2] In the mid-1960s, "Chuck" August decided that his muffler shops should offer an expanded list of services. This was not in line with the other organization's wishes. In 1966, he discontinued his affiliation with Midas Muffler. [2]

6. Sound attenuator - Wikipedia

   en.wikipedia.org/wiki/Sound_attenuator

   A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.

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