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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. Transmission loss (duct acoustics) - Wikipedia

   en.wikipedia.org/wiki/Transmission_Loss_(duct...

   Transmission loss (TL) in duct acoustics describes the acoustic performances of a muffler-like system.It is frequently used in the industry areas such as muffler manufacturers and NVH (noise, vibration and harshness) department of automobile manufacturers, and in academic studies.

4. 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 ...

5. Expansion chamber - Wikipedia

   en.wikipedia.org/wiki/Expansion_chamber

   When the transfer is complete, the piston is on the compression stroke but the exhaust port is still open, an unavoidable problem with the two stroke piston port design. To help prevent the piston pushing fresh mixture out the open exhaust port the strong acoustic wave (produced by the combustion) from the expansion chamber is timed to arrive ...

6. Brutally honest reviews of every VMAs performance, including ...

   www.aol.com/brutally-honest-reviews-every-vmas...

   The MTV VMAs have officially hit middle age, but that didn't translate to a lack of alluring performances.. The 40 th incarnation of the show Wednesday demonstrated why pop supernova Chappell Roan ...

7. The upperclassmen: Oregon, Ohio St. leaned on well-traveled ...

   www.aol.com/upperclassmen-oregon-ohio-st-leaned...

   Gabriel, the former UCF and Oklahoma starter, is a big proponent of what has become the new normal, when quality players can make solid NIL money while playing elite college football through their ...