bel

Unit expressing the relative intensity of a sound. The intensity in bels is the logarithm (to the base 10) of the ratio of the power of the sound to that of a reference sound. Ordinarily, the reference sound is assumed to be one with a power of 10−16 watts per sq cm, approximately the threshold of a normal human ear at 1000 Hz. [A.G. Bell, Scottish-U.S. scientist, 1847–1922]
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blood ethanol level; bovine embryonic lung

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bel 'bel n ten decibels abbr. b
Bell 'bel Alexander Graham (1847-1922)
American inventor. Bell began his career in the fields of speech and acoustics. Training teachers of the deaf, he and his father developed „visible speech,” a system of symbolic representations of the physical process of speech. His investigations into the application of electricity to the production and analysis of sound resulted in the invention of a multiplexing telegraph system. Further experimentation in telegraphy led to work on a method of electrically transmitting actual voice sounds, and in 1876 his work culminated in the invention of the telephone. Later inventions included a telephonic device using the modulation of a light beam, an audiometer, an improved phonograph, and an electrical induction device for the detection of metallic objects in the body. Throughout his life he remained deeply interested in the teaching of speech to the deaf.

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n.

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(B) (bel) [Alexander Graham Bell, American inventor, 1847–1922] a unit of relative power intensity used for acoustic or electric power, defined as the base 10 logarithm of the ratio of the measured power to some reference power level. A change of one bel is a tenfold power increase. Measurements are usually expressed in decibels (q.v.).

Medical dictionary. 2011.

Look at other dictionaries:

  • bel — bel …   Dictionnaire des rimes

  • Bel — Saltar a navegación, búsqueda Bel (apócope de Belu) es el nombre dado a un dios babilónico identificado con diversas deidades en varias etapas históricas. Su nombre deriva de un término acadio que significa “Señor”, “amo” o “Dueño”. Contenido 1… …   Wikipedia Español

  • Bel — Ridge, MO U.S. village in Missouri Population (2000): 3082 Housing Units (2000): 1288 Land area (2000): 0.811259 sq. miles (2.101151 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.811259 sq. miles (2.101151… …   StarDict's U.S. Gazetteer Places

  • Bel, MO — Bel Ridge, MO U.S. village in Missouri Population (2000): 3082 Housing Units (2000): 1288 Land area (2000): 0.811259 sq. miles (2.101151 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.811259 sq. miles… …   StarDict's U.S. Gazetteer Places

  • bel — BEL, beli, s.m. Unitate de măsură pentru intensitatea sunetelor. – Din fr. bel. Trimis de paula, 02.06.2002. Sursa: DEX 98  bel s. m., pl. beli; simb. B Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  BEL beli m. Unitate de măsură a… …   Dicționar Român

  • Bel — can mean:* Bel, a unit of ratio equal to ten decibels * Bel (god), a Semitic deity (cf Baal) * Bel (Belenos); a Celtic deity * Bael; a tree (or its fruit) native to India * Behind Enemy Lines, an American crust punk band * Bel, fictional lord of… …   Wikipedia

  • BEL — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. {{{image}}}   Sigles d une seule lettre   Sigles de deux lettres > Sigles de trois lettres …   Wikipédia en Français

  • bel — Bel, Cerchez Beau, Les François dient et escrivent bel, si le mot suyvant commence par une voyelle, comme bel homme, bel arbre, bel oiseau …   Thresor de la langue françoyse

  • BEL — can be an abbreviation for: * BEL or bell character in the C0 control code set * Belarusian language, in the ISO 639 2 and SIL country code lists *, in the ISO 3166 1 3 letter country code list * Bharat Electronics Limited * Bellingham (Amtrak… …   Wikipedia

  • Bél — (spr. bēl), 1) (Belius) Matthias, ungar. Geschichtschreiber, geb. 24. März 1684 in Ocsowa bei Neusohl, gest. 29. Aug. 1749 in Preßburg, studierte in Halle Medizin, dann Theologie, ward Lehrer am Waisenhaus und übersetzte asketische Schriften… …   Meyers Großes Konversations-Lexikon

  • bel — Mot Monosíl·lab Nom masculí bèl·lic bèl|·lic Mot Pla Adjectiu variable …   Diccionari Català-Català

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