baffle

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baffle

a plate or mechanical device designed to restrain or regulate the flow of a fluid, the emission of light or sound, or the distribution of sound, esp in a loudspeaker or microphone
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Baffle

An opaque or translucent element used to diffuse or shield a surface from direct or unwanted light.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Baffle

 

an installation in the afterbay of an overflow dam that changes the direction of the flow and spreads the width of the water stream when only some of the spillway apertures in the dam are functioning. The basic purpose of a baffle is to ensure a fairly uniform distribution of the flow velocities and to reduce them on the downstream apron. A distinction is made between a ramp baffle (continuous or slotted), which is installed along the entire width of the water apron, and a baffle formed of piers, which is placed at an angle to the water stream.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

baffle

[′baf·əl]
(electricity)
Device for deflecting oil or gas in a circuit breaker.
(electronics)
An auxiliary member in a gas tube used, for example, to control the flow of mercury particles or deionize the mercury following conduction.
(engineering)
A plate that regulates the flow of a fluid, as in a steam-boiler flue or a gasoline muffler.
(engineering acoustics)
A cabinet or partition used with a loudspeaker to reduce interaction between sound waves produced simultaneously by the two surfaces of the diaphragm.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

baffle

1. A plate used to control the flow of a liquid.
2. An opaque or translucent plate used to shield a light source from direct view at certain angles; a light baffle.
3. A flat deflector or obstruction designed to reduce sound transmission.
4. A plate that retards and/or changes the direction of the flow of air, air-gas mixtures, or flue gases.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

baffle

baffle
A fuel tank with baffle plates.
baffleclick for a larger image
baffleclick for a larger image
baffle
i. A series of partitions in a fuel tank to control the rapid flow of fuel and prevent its sloshing. These partitions have holes that allow the fuel to feed to the tank outlet, but they keep the fuel from surging enough to uncover the fuel outlet.
ii. A partition separating the upper portion of the tank that prevents oil pump cavitation as oil tends to rush to the top of the tank during deceleration periods. The baffle is fitted with a weighted swirl outlet control valve that is free to swing below the baffle. The valve closes when oil at the bottom of the tank rushes up when the aircraft decelerates.
iii. A sheet metal shield used to direct the flow of air between and around the cylinders of an air-cooled reciprocating engine.
iv. A partial partition in the pitot system to trap moisture and any solid matter as well as to reduce turbulence.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
THE drive for Scottish independence is greeted with "bafflement" around the world, according to Foreign Secretary William Hague.
With the advent of the digital age and increased reliance on computers, the use of tech terminology has become commonplace, to the bafflement of many.
* ONE bookmaker, hearing of Gobata's idea of a trainers' Premier League, expressed mock bafflement: "I thought we already had a Premier League.
The hat has attracted much mirth and bafflement across the world being compared to a Turkey Twizzler, a toilet seat and even a giant pretzel.
To the bafflement of his escorts, he decided to walk through the middle of the crowd, rather than by the planned route around the edges of the protest.
Natalia Tena's Desdemona is as strong willed as you might expect of a woman who has made a marriage she must know will dismay her father, but completely disabled by bafflement at her husband's jealousy.
Constellation Brands Inc., pushing ahead with an unsolicited takeover bid for Vincor International Inc., expressed bafflement that the Canadian wine producer viewed the $900 million offer as "opportunistic and inadequate." U.S.-based Constellation said it would be willing to sweeten its bid "should discussions with Vincor demonstrate that additional value is warranted." It urged Vincor to negotiate a friendly takeover deal before October 14.
Her memoir, a best-seller when it was published in 2002 as Zonenkinder, conveys the post-reunification bafflement experienced by "the last generation of GDR kids." It also raises the question of whether the oppressive yet comforting life of their childhood wasn't so bad, after all.
The revival of the coalition may result in a "lot of bafflement" but not a "widespread rejection", according to Jean-Claude Juncker, the Luxembourg Christian Democrat Prime Minister.
Catton Park fishery owner Graham Davis looks after a mile-long run of the Trent in addition to his main stillwater facility and expresses 'bafflement' as to why the river stretch is poorly patronised.
AT FIRST THE NEWS OF KIRK VARNEDOE's departure from the Museum of Modern Art was a source of bafflement to much of the art world.
But during our last meeting at his home in Susquehanna County, Pennsylvania, just after he'd read the final, metafictional draft of my second novel (he had railed against "metafiction" for years), Gardner said, with a tinge of uncharacteristic bafflement that bothered us both, "This is a different Charles Johnson."