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Bel (bāl, bĕl), deity of the Middle Eastern religions. The name is a cognate of that of Baal. For Bel in the Bible, see Bel and the Dragon.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the unit for a relative logarithmic quantity (the logarithm of the ratio between two physical quantities of the same name) that is used in electrical engineering, radio engineering, acoustics, and other branches of physics. It is designated by the letter B and is named after the American inventor of the telephone, A. G. Bell. The number of bels N, which corresponds to the ratio of two energy quantities P1 and P2 (which relate to power, energy, energy density, and so on), is expressed by the formula N = log (P1/P2); for “force” magnitudes F1 and F2 (voltage, current strength, pressure, field strength, and others), it is expressed as N = 2 log (F1/F2). The tenth part of a bel, called a decibel (dB), is usually used.

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


A dimensionless unit expressing the ratio of two powers or intensities, or the ratio of a power to a reference power, such that the number of bels is the common logarithm of this ratio. Symbolized b; B.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


A unit of sound level which denotes the ratio between two quantities proportional to power; the number of bels equals the logarithm of this ratio, to the base 10; 1 bel=10 decibels.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.


a unit for comparing two power levels, equal to the logarithm to the base ten of the ratio of the two powers.
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


This article is provided by FOLDOC - Free Online Dictionary of Computing (

bell character

The control code used to sound an audible bell or tone in order to alert the user (ASCII 7, EBCDIC 2F).


A unit of measurement of the loudness or strength of a signal. One deciBel is considered the smallest difference in sound level that the human ear can discern. Created in the early days of telephony as a way to measure cable and equipment performance and named after Alexander Graham Bell, deciBels (dBs) are a relative measurement derived from two signal levels: a reference input level and an observed output level. A deciBel is the logarithm of the ratio of the two levels. One Bel is when the output signal is 10x that of the input, and one deciBel is 1/10th of a Bel.

Sound Levels
A whisper is about 20 dB. A normal conversation is typically from 60 to 70 dB, and a noisy factory from 90 to 100 dB. Loud thunder is approximately 110 dB, and 120 dB borders on the threshold of pain. In 1883, the volcano on the Indonesian island of Krakatoa erupted. A hundred miles away, the sound level reached more than 170 dB, deafening everyone who survived. See dBm.
INCREASE IN POWER LEVELS (WATTS)Formula is dB=10*log(P1/P2)DeciBels   Output Signal Strength
       3dB           2x
       6dB           4x
      10dB (1 Bel)  10x
      20dB         100x
      30dB       1,000x
      40db      10,000x

   ATTENUATION OF AMPLITUDE (VOLTS or AMPS)Formula is dB=20*log(A1/A2)DeciBels   Output Signal Strength
      -3dB        0.707x
      -6dB        0.5x
     -10dB        0.316x
     -20dB        0.1x
     -30dB        0.032x
     -40db        0.010x

Bels and Bells
Quite a lot was named after Alexander Graham Bell. Throughout the 20th century, the Bell name was ubiquitous. It will live on with the deciBel.
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References in periodicals archive ?
The rekindled relationship was torn apart when Bel's sister spotted snaps of Collins and Lisa on Facebook.
"Fresh Eyes will be a popular add-on at Toppers, and has the potential to be bundled with other services like nails, hair, and even makeup," stated Bel Mondo President Lou Martelli.
MICHAELGANNON H Lloris (Fra), S Ramos (Spa), S Coates (Uru), D Alves (Bra), J Alba (Spa), E Hazard (Bel), T Kroos (Ger), Oscar (Bra), L Suarez (Uru), Neymar (Bra), E Cavani (Uru).
BEL, which was established in 1954, is a state-owned electronics company with nine factories and regional offices in India.
Consider that operator Bel follows KD45 axioms of model logic, with P also getting beliefs as follows:
The letters show Shinde's complete backing for BEL and raising a finger at the allotment given to Jindal Steel and Power Limited for the same coal block.
Bel Ami is bassed on 1885 French novel by Guy de Maupassant.
Bel Ayneh compensated for her colleague Aliah Saeed, who did not start the race because of a last-minute injury and had to withdraw from the competition.
Tour of Flanders winners - 2010 F Cancellara (Swi) 2009 S Devolder (Bel) 2008 S Devolder (Bel) 2007 A Ballan (Ita) 2006 T Boonen (Bel) 2005 T Boonen (Bel) 2004 S Wesemann (Ger) 2003 P van Petegem (Bel) 2002 A Tafi (Ita) 2001 G Bortolami (Ita) 2000 A Tchmil (Bel) 1999 P van Petegem (Bel) 1998 P van Petegem (Bel)
Jerome Bel's Cedric Andrieux, 2009, begins promisingly enough, with the handsome, virtuosic, eponymous French dancer walking casually onstage and plainly announcing: "My name is Cedric Andrieux.
9 April 2010 - French dairy company Fromageries Bel has announced its intention to sell Czech cheese producer Jaromericka, a company acquired only 2 years ago.