decibel

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decibel

 [des´ĭ-bel]
a unit of relative power intensity equal to one tenth of a bel, used for electric or acoustic power measurements; one decibel equals approximately the smallest difference in acoustic power the human ear can detect and an increase of 10 decibels approximately doubles the loudness of a sound. Abbreviated dB or db.
 Examples of decibel levels in everyday situations. From Frazier et al., 1996.

dec·i·bel (dB, db),

(des'i-bel), Avoid the mispronunciation des'i-b'l.
One tenth of a bel; unit for expressing the relative intensity of sound on a logarithmic scale.
[L. decimus, tenth, + bel]

decibel

/dec·i·bel/ (des´ĭ-bel) a unit used to express the ratio of two powers, usually electric or acoustic powers, equal to one-tenth of a bel; one decibel equals approximately the smallest difference in acoustic power the human ear can detect.

decibel (dB)

[des′əbəl]
Etymology: L, decimus, one tenth, bel, Alexander G. Bell, Canadian inventor, 1847-1922
a unit of measure of the intensity of sound. A decibel is one tenth of 1 bel (B); an increase of 1 B is perceived as a 10-fold increase in loudness, based on a sound-pressure reference level of 0.0002 dyne/cm2, or 20 micropascals.

dec·i·bel

(dB) (des'i-bĕl)
One tenth of a bel; unit for expressing the relative loudness of sound on a logarithmic scale.
[L. decimus, tenth, + bel]

decibel

A logarithmic unit of comparison between a standard power level and an observed level. The decibel is not a unit of sound intensity but is widely used to compare a noise level with a very low standard reference level near the limit of audibility, and to compare electrical power levels. A tenth of a bel.

Decibel

A unit of measure for expressing the loudness of a sound. Normal speech is typically spoken in the range of about 20-50 decibels.
Mentioned in: Audiometry, Hearing Loss

decibel (dB)

1. Unit used for the measurement of the intensity of a sound. 2. Light intensities are often presented on a logarithmic (rather than linear) scale. This is done, in particular, to abbreviate large numbers. Moreover, it has become common, especially in perimetry, to use decibels rather than log units. A decibel scale is a logarithmic scale where 10 decibels are equal to 1 log unit; 20 decibels, to 2 log units, etc. In perimetry, decibels are used to indicate the attenuation of brightness of the stimulus. Thus, a 20 dB stimulus is equal to one-tenth the brightness of a 10 dB stimulus.

dec·i·bel

(dB) (des'i-bĕl)
One tenth of a bel.
[L. decimus, tenth, + bel]

decibel (des´ibel),

n a logarithmic ratio unit that indicates by what proportion one intensity level differs from another.

decibel

a unit used to express the ratio of two powers, usually electric or acoustic powers, equal to one-tenth of a bel; one decibel equals approximately the smallest difference in acoustic power the human ear can detect. Abbreviated dB or db. See also bel.
References in periodicals archive ?
Normal conversation would record a level of around 65 decibels, while sustained exposure to a level of 95 decibels would lead to hearing loss.
Six years ago, Register-Guard reporter Tim Christie stood on the sidelines during Oregon's thrilling 24-22 win over USC and recorded a game-high 112 decibels - equivalent to your average rock concert.
During the day, the number of people affected by noise over 57 decibels would rise almost four times to 129.
The research team found the worst pubs for hearing are in Dublin's Temple Bar - where one drinking hole almost hit 100 decibels.
27 mins: A lull in the game brought fresh shouts of "Keegan" from the home supporters, raising the sound 20 decibels from 77.
Another 2,600 people living in 1,100 homes will be exposed to averages of 63 decibels and may be entitled to compensation.
120 DECIBELS Thunder, loud stereo, night club, chainsaw, noisy toys, hammer on nail, rock concert, emergency siren
The recommended noise level for feature films in the UK is 82 decibels but the adverts and trailers have levels much higher.
A reduction in sound level of 10 decibels means a 68% reduction in sound strength and the negative effect on hearing.
We found that as blood-lead levels increasedfrom approximately 10 [mu]g/dl to approximately 30 or 35 [mu]g/dl, there was a hearing loss in the range of about 10 decibels," he says.
Participants can enter cap codes using their mobile phones to accrue points, or 'Decibels,' in their Decibel Central account on Cokemusic.
It's just 9/4 that the noise in the ground will record between 121-125 decibels.