Английский Этимологический словарь - decibel
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Decibel
decibel
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1.
~ n technical a unit of measurement for the loudness of sound (The noise level in factories must not exceed 85 decibels.) ...Longman Dictionary of Contemporary English
2.
(decibels) A decibel is a unit of measurement which is used to indicate how loud a sound is. Continuous exposure to sound above 80 decibels could be harmful. N-COUNT: oft num N ...Collins COBUILD Advanced Learner's English Dictionary
3.
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 ratio of the magnitudes of two electric voltages or currents or analogous acoustic quantities equal to 20 times the common logarithm of the voltage or current ratio 2. a unit for expressing the relative intensity of sounds on a scale from zero for the average least perceptible sound to about 130 for the average pain level 3. degree of loudness; also extremely loud sound — usually used in plural ...Merriam-Webster Collegiate Dictionary
4.
n. a unit (one-tenth of a bel) used in the comparison of two power levels relating to electrical signals or sound intensities, one of the pair usually being taken as a standard. Usage Abbr.: dB. ...Толковый словарь английского языка Oxford English Reference
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6.
децибел, дБ – decibels above 1 femtowatt – decibels above 1 kilowatt – decibels above 1 milliwatt – decibels above 1 picowatt – decibels above reference coupling – decibels above reference noise – decibels above 1 volt – decibels above 1 watt – decibels adusted – decibels over isotropic ...Англо-русский Русско-английски словарь по телекоммуникациям
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