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 It might be outdated or ideologically biased.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 ?
Most notably, a cultural confusion arises with the number of bafflingly named characters, some of whom change their names as the novel progresses.
To the man in the street, the new system looks bafflingly opaque.
The incomprehensible nature of artistic creation is the centerpiece of his new work, set in 1919, which follows Myra as she bafflingly continues to turn in transcribed chapters of Mr.
Ataka's demand for a referendum would defuse the issue, he claimed, somewhat bafflingly. Campaigners geared up for a fight and opposition politicians said they would raise the issue in the European Parliament.
Traversa is an exercise in rough-and-ready writing that is as bafflingly mundane as it is exciting.
railway project was noisy, smelly, hot, strenuous and sometimes bafflingly mundane work--but it taught me to appreciate every minute in front of my laptop, tapping away at the keys.
In Much Ado About Nothing's first scene, for example, the bafflingly obscure teasing of Benedick for his misogyny "conceals a skein of allusions associating Benedick with the thousands of 'don't knows' who were beginning to regret their conformity, to the state religion."
Dressed in white body wraps and creating a bafflingly unique combination of synth and guitar sounds, they only attracted boos, not new fans.
No, Zerzan replied, bafflingly: "Tools are not technology." What about the positive uses of technology in bringing people together through the Internet?
With qualifications, it expressed itself in landscapes, still lifes, portraits, and--Riegl somewhat bafflingly claims--in genre painting.
If one group of American men feels truly "stiffed," it is divorced fathers, bafflingly absent from Faludi's account.