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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. Exhaust system - Wikipedia

    en.wikipedia.org/wiki/Exhaust_system

    Exhaust system of the Opel Corsa B 1.2 petrol Exhaust manifold (chrome plated) on a car engine. An exhaust system is used to guide reaction exhaust gases away from a controlled combustion inside an engine or stove. The entire system conveys burnt gases from the engine and includes one or more exhaust pipes. Depending on the overall system ...

  6. Tuned exhaust - Wikipedia

    en.wikipedia.org/wiki/Tuned_exhaust

    A 4-2-1 exhaust system is a type of exhaust manifold for an engine with four cylinders per bank, such as an inline-four engine or a V8 engine. The layout of a 4-2-1 system is as follows: four pipes (primary) come off the cylinder head , and merge into two pipes (secondary), which in turn finally link up to form one collector pipe.

  7. Florida man accused of hate crime in deadly shooting of gay ...

    www.aol.com/florida-man-accused-hate-crime...

    A Florida man accused of a hate crime for killing a gay man is asking a judge to dismiss the charges, saying he acted in self-defense. Gerald Radford testified on Friday that he feared for his own ...

  8. Lockheed Martin (LMT) Q3 2024 Earnings Call Transcript - AOL

    www.aol.com/lockheed-martin-lmt-q3-2024...

    So in summary, on Chart 11, performance year-to-date gives us confidence to raise the full year outlook for 2024 and in our ability to deliver solid sales and free cash flow growth over the next ...

  9. Best CD rates today: Lock in yields of 4.5% and higher ahead ...

    www.aol.com/finance/best-cd-rates-today-lock-in...

    The FDIC is an independent government agency charged with maintaining stability and public confidence in the U.S. financial system and providing insurance on consumer deposit accounts.

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