decibel scale

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• Decibel — This article is about the ratio of measures. For sound or acoustic level, see Sound pressure. For other uses, see Decibel (disambiguation). Attenuation chart of an RG 6 Coaxial cable, measured in decibels per 100 feet of cable The decibel (dB) is …   Wikipedia

• decibel — One tenth of a bel; unit for expressing the relative intensity of sound on a logarithmic scale. [L. decimus, tenth, + bel] * * * deci·bel des ə bəl, .bel n 1 a) a unit for expressing the ratio of two amounts of electric or acoustic signal power… …   Medical dictionary

• Décibel — Pour les articles homonymes, voir Décibel (homonymie). Le décibel (dB) est un sous multiple du bel, correspondant à un dixième de bel. Nommé en l’honneur de l’inventeur Alexandre Graham Bell, le bel est un outil mathématique, sans unité, de… …   Wikipédia en Français

• Decibel —     Watson, come here, I want you was the first sentence ever spoken over a telephone. On March 10, 1876, in a house in Boston, Alexander Graham Bell (1847 1922) uttered those historic words. The message carried, and the telephone was born.… …   Dictionary of eponyms

• decibel — dB; n. one tenth of a bel: a unit for comparing levels of power (especially sound) on a logarithmic scale. A power source of intensity P has a power level of 10 log10 P/P 0 decibels, where P 0 is the intensity of a reference source. The decibel… …   The new mediacal dictionary

• decibel — (dB)    a customary logarithmic measure most commonly used (in various ways) for measuring sound. The human ear is capable of detecting an enormous range of sound intensities. Because of this great range, and because our perception of sound is… …   Dictionary of units of measurement

• decibel — (dB) Unit used for measuring relative loudness of sounds. One decibel is equal to approximate difference of loudness ordinarily detectable by human ear, the range of which is about 130 decibels on scale beginning with one for faintest audible… …   Dictionary of automotive terms

• decibel — noun Etymology: International Scientific Vocabulary deci + bel Date: 1928 1. a. a unit for expressing the ratio of two amounts of electric or acoustic signal power equal to 10 times the common logarithm of this ratio b. a unit for expressing the… …   New Collegiate Dictionary

• decibel (dB) — Unit for measuring the relative intensities of sounds or the relative amounts of acoustic or electric power. Because it requires about a tenfold increase in power for a sound to register twice as loud to the human ear, a logarithmic scale is… …   Universalium

• decibel — noun /ˈdɛsɪbɛl,ˈdɛsɪbəl/ A common measure of sound intensity that is 1 tenth of a bel on the logarithmic intensity scale. It is defined as dB = 10 , log(P /P ), where P and P are the relative powers of the sound …   Wiktionary

• decibel — /ˈdɛsəbɛl / (say desuhbel) noun a unit expressing the ratio between a power, voltage, current or sound intensity and a reference value, using a logarithmic scale; equal to one tenth of a bel. Symbol: dB {deci + bel} …