ALL meanings of decibel
dec·i·bel
D d - countable noun decibel A decibel is a unit of measurement which is used to indicate how loud a sound is. 3
- noun decibel a unit for comparing two currents, voltages, or power levels, equal to one tenth of a bel 3
- noun decibel a similar unit for measuring the intensity of a sound. It is equal to ten times the logarithm to the base ten of the ratio of the intensity of the sound to be measured to the intensity of some reference sound, usually the lowest audible note of the same frequency 3
- noun decibel a numerical expression of the relative loudness of a sound: the difference in decibels between two sounds is ten times the common logarithm of the ratio of their power levels 3
- noun decibel a numerical expression of the relative differences in power levels of electrical signals equal to ten times the common logarithm of the ratio of the two signal powers Sometimes an absolute reference is used in the power ratio (10-16 watt per sq cm in acoustics, one milliwatt in electronics and radio) 3
- noun decibel A decibel is a method for specifying the ratio of two signals. 3
- noun decibel unit of sound 1
- noun decibel a unit used to express the intensity of a sound wave, equal to 20 times the common logarithm of the ratio of the pressure produced by the sound wave to a reference pressure, usually 0.0002 microbar. 1
- noun decibel a unit of power ratio, the number of units being equal to a constant times the logarithm to the base 10 of the intensities of two sources. 1
- noun decibel a unit used to compare two voltages or currents, equal to 20 times the common logarithm of the ratio of the voltages or currents measured across equal resistances. Abbreviation: dB, db. 1
- noun decibel A unit used to measure the intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale. 1
- noun decibel A common measure of sound intensity that is one tenth of a bel on the logarithmic intensity scale. It is defined as dB = 10 * log10(P 1/P 2), where P1 and P2 are the relative powers of the sound. 0