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2. 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.

3. Hush kit - Wikipedia

   en.wikipedia.org/wiki/Hush_kit

   Hush kit for the Pratt and Whitney JT8D-1 through -17 engines Two JT4As installed on a KLM DC-8. A hush kit is an aerodynamic device used to help reduce the noise produced by older aircraft jet engines. These devices are typically installed on older turbojet and low-bypass turbofan engines, as they are much louder than later high-bypass ...

4. Exhaust system - Wikipedia

   en.wikipedia.org/wiki/Exhaust_system

   A typical exhaust system. The parts' names translate as follows: Krümmer: manifold (in this case, the exhaust manifold); Hosenrohr: downpipe; Katalysator: catalytic converter; Mittelschalldämpfer: middle silencer (or center muffler); Vorschalldämpfer: front silencer (or pre-muffler); Nachschalldämpfer: rear silencer (or main muffler); Endrohr: tailpipe.

5. 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 ...

6. Muffler (disambiguation) - Wikipedia

   en.wikipedia.org/wiki/Muffler_(disambiguation)

   A muffler is a device for reducing the amount of noise emitted by a machine. ... (scarf), a common type of scarf; A silencer fitted to a gun, known as a suppressor ...

7. Diesel generator - Wikipedia

   en.wikipedia.org/wiki/Diesel_generator

   A 200 kW Caterpillar diesel generator set in a sound attenuated enclosure used as an emergency backup at a sewage treatment substation in Atlanta, United States. A diesel generator (DG) (also known as a diesel GenSet) is the combination of a diesel engine with an electric generator (often an alternator) to generate electrical energy. [1]