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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. 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. Hush kit - Wikipedia

   en.wikipedia.org/wiki/Hush_kit

   Rolls-Royce Conway Mk508 (1959) with hush kit attached. The most common form of hush kit is a multi-lobe exhaust mixer.This device is fitted to the rear of the engine and mixes the jet core's exhaust gases with the surrounding air and a small amount of available bypass air.

5. Sound baffle - Wikipedia

   en.wikipedia.org/wiki/Sound_baffle

   Sound baffles are also used in speaker cabinets to absorb energy from the pressure created by the speakers, thus reducing cabinet resonance. In 1973, Pearl P. Randolph, a school bus driver in Virginia, won a new school bus in a national contest held by Wayne Corporation for the suggestion that sound baffles be installed in the ceiling of school ...

6. Silencer (firearms) - Wikipedia

   en.wikipedia.org/wiki/Silencer_(firearms)

   Baffles are usually circular metal dividers that separate the expansion chambers. Each baffle has a hole in its center to permit the passage of the bullet through the silencer and toward the target. The hole is typically at least 1mm larger than the bullet caliber to minimize the risk of the bullet hitting the baffle, called a baffle strike.

7. Kimberly Williams-Paisley Opens Up About 'Terrifying' 2 ... - AOL

   www.aol.com/lifestyle/kimberly-williams-paisley...

   Kimberly Williams-Paisley suddenly lost her voice in 2022 and couldn't speak above a whisper for nearly two years. The According to Jim actress felt 'invisible' and 'trapped' as she searched for ...