The unit of measurement to compare the relative intensity of acoustic or electrical signal, equal to one-tenth of a bel, named for American inventor Alexander Graham Bell (1847 to 1922). The logarithm [..]

1928, from deci- + bel (n.). Progress in science and industry is constantly demanding new terms and one of the latest of these is the word "decibel," coined by telephone engineers to describ [..]

(Abbreviated dB.) A logarithmic measure of the relative power, or of the relative values of two flux densities, especially of sound intensities and radio and radar power densities. The difference n in [..]

The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. A decibel is [..]

A measurement that refers to the ratio of the strength of one signalto another. Decibels are commonly used to express signal lossor the relationship of the signal strength to ambient noise.

The unit for measuring the loudness or intensity of sound.

A unit of measurement, literally meaning one-tenth of a bel. Primarily used in acoustics, decibel measurements balance the power ratio and amplitude of a wave. In the world of audiophiles and consumer [..]

See dB.

A practical unit for measuring the ratio of the difference in intensity (power) of two waveforms, usually sound or power; the basic bel unit is the logarithm to the base 20 of their ratios, and one de [..]

This is the ratio of two signal levels where the relationship is governed by the equation:

(de��ci��bel) A unit of measurement used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm (an exponent us [..]

The logarithmic unit that is used to express the loudness or intensity of sound.

A standard logarithmic unit used to measure level of sound pressure (loudness). One decibel is equal to one-tenth of a unit of sound measurement known as a bel. Developed from methods used during the [..]

The logarithmic unit of signal power ratio most commonly used in telephony. It is used to express the relationship between two signal powers, usually between two acoustic, electric, or optical signals [..]

A logarithmic unit for measuring the intensity of sound which corresponds to the listener's perception of loudness.

This is simply a measure of sound intensity. When you are at the Smashing Pumpkins concert, standing next to the speakers, banging your head, the volume of the music is measured in decibels. The highe [..]

1. A measurement of sound. Technically, a logarithmic measure of the ratio of two signal levels using the formula: dB=20Log(V1/V2)=10Log(P1/P2), or just the simplified formula, dB=10Log(P1/P2). 2. Decibel is the unit used to express relative differences in signal strength. It is expressed as the base 10 logarithm of the ratio of the powers of two s [..]

A unit of power (sound, optical or electrical) increase or decrease that is proportional to the exponential increase or decrease of power.

A measurement in strength of sound or voltage.

A unit to express differences of power level. Used to express power gain in amplifiers or power loss in passive circuits or cables.

A decibel is a logarithmic power ratio, abbreviated dB. May also represent a voltage or current ratio if the voltages or currents are measured across (or through) identical impedance. Suffixes to the abbreviation indicate references: dBi, isotropic radiator; dBic, isotropic radiator circular; dBm, milliwatt; dBW, watt.

A unit for measuring the intensity of sound. 0 would be no sound, 130 would cause acute aural pain.

A unit of measure used to represent audio transmission levels, gains or losses. It describes the smallest perceptible change in audio level.

A measure of sound intensity. See Box 9.1.

A unit of sound intensity level; 0.1 bel.

A unit of noise measurement: the logarithmic function of sound energy. dBA)

A measure of the ratio between two quantities, and is used in a wide variety of measurements in acoustics, physics and electronics. The decibel is widely used in measurements of the loudness of sound.

Unit of measurement of sound level.

The decibel is a unit which denotes the magnitude of a quantity with respect to an arbitrarily established reference value of the quantity, in terms of the logarithm (to the base 10) of the ratio of q [..]

A unit of sound intensity level. The smallest change of sound intensity that the normal human ear can detect.

a logarithmic measure for power ratios, applied e.g. to optical powers or to noise powers

a common measure of sound intensity that is 1 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.

(n) a logarithmic unit of sound intensity; 10 times the logarithm of the ratio of the sound intensity to some reference intensity

A bel is a unit for comparing the levels of sounds and a decibel is a tenth of a bel. If P1 and P2 are two power levels then 1dB = 10 log (P2/P1) dB. [more]

Pronunciation ˈdesɪbel A unit of relative intensity or amplitude. Usually abbreviated to dB. When dealing with intensity ratios the decibel is defined by the formula 10 log(I1/I2), where I1 and I2 are [..]

The bel (symbol B) expresses the ratio of two powers by the decimal logarithm of this ratio. This unit is not often used, having been replaced by the decibel (symbol dB) which is one-tenth of a bel. F [..]

A unit of measurement for the loudness of a sound. The highest decibels indicate the loudest sounds.

a relative unit used to describe sound intensities. Written as dB. See Advanced Topic: Introduction to Decibels.

 - A logarithmic mathematical ratio that indicates a devices electric or acoustic signal to that of another

A logarithmic measure of the ratio of two quantities. Abbreviated dB. For electrical power, 1 dB = 10 x log

A unit used to measure relative increase or decrease in power, voltage or current using a logarithmic scale.

a unit of measurement for sound, it measures the loudness or volume of the sound waves.

A measure of sound level. Used as a measure of noise pollution

a logarithmic measure of the ratio of two quantities. Abbreviated dB. For electrical power, 1 dB = 10 x log10 P1/P2. For electric voltage or current, 1 dB = 20 x log10 E1/E2.

Measures the intensity (loudness) of sound.

A non-dimensional number used to express sound pressure and sound power. It is logarithmic expression of the ratio of a measure quantity to a reference quantity.

A logarithmic measure of the ratio of two quantities. Abbreviated dB. For electrical power, 1 dB = 10 x log10 P1/P2. For electric voltage or current, 1 dB = 20 x log10 E1/E2.

A logarithmic unit for expressing power relationships. n = 10 log10(I1/I2) where n is the difference of decibels of intensities 1 & 2.

A dimensionless unit of acoustic measurement in sound level meters where 0dB is the threshold of normal hearing and 130 dB is the threshold of pain.

The decibel is used to measure sound levels.  Doubling noise energy corresponds to a variation in noise intensityof 3 dB. It can integrate various weightings to reflect the sensitivity of the human ea [..]

A logarithmic measure of the ratio of two quantities. Abbreviated dB. For electrical power, 1 dB = 10 x log10 P1/P2. For electric voltage or current, 1 dB = 20 x log10 E1/E2.

The power or voltage ratio of two signals.

A unit of measure expressing volume or loudness.

a decibel (or dB ) is 1/10th of a bel, which is a relative measure of two sounds.

The unit used to express the sound pressure level. Decibels are measured in several scales. The "A" weighting scale, expressed as dB(A), approximates human hearing and is used for the Standard Stationary motorcycle and ATV sound test procedures.

A unit used to measure the relative intensity of sound.

The measurement of the intensity of sound.

A logarithmic unit that expresses the ratio between a signal and a reference signal. For voltages, dB = 20 log (Vmeasurement/Vnominal).

A unit of measure used to represent audio transmission levels, gains or losses. It describes the smallest perceptible change in audio level.

A logarithmic measure of relative power levels. It is used to specify the amount of attenuation in optical fibers. 

dB, an expression of ratio (see dB, above). One tenth of a Bel. See NIST website for further definition.

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 level at which sound causes pain to humans. Abbreviated [..]

The decibel (abbreviated as dB) is a common unit of measurement for the relative loudness of a sound or, in electronics, for the relative difference between two power levels.

This is a logarithmic expression comparing the energy that the radar emits (Z1) to the energy that radar receives back from a radar target (Z2). It is expressed mathematically as Z (dBZ) = 10 log (Z1/Z2) The solution to this equation lets the radar operator know the strength of a target. The value of Z is a function of the amount of radar beam ener [..]

The process of removing ice or frost buildup from the outdoor coil during the heating season.

A dimensionless unit used for expressing the ratio between widely different powers. It is 10 times the logarithm to the base 10 of the power ratio.

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 be [..]

Measuring unit for the intensity and pressure of sound. The difference in intensity between the softest sound the human ear can perceive and the pain threshold is 1:10 trillion. To depict this enormous range objectively, acoustics uses the logarithmic decibel scale. On this scale, the value “0” is assigned to the perception threshold (for a sound o [..]

A decibel is a logarithmic measure of sound pressure. An increase of about nine decibels is roughly equivalent to doubling the amount of sound pressure. Decibels measure only the pressure of a sound wave and not its power. The power of a sound wave is roughly the square of its pressure.

A unit used to measure the relative intensity of sound.

A unit of sound measurement. Sound doubles in loudness for every 10 decibels.

(1) a logarithmic scale used to denote a change in the relative strength of an electric signal or acoustic wave. It is a standard unit for expressing the ratio between power and power level. Using the [..]

Accepted unit of measure to express amplitude or power difference. A common measure for sound and also used often in measuring effectiveness of amplifiers.

unit of measurement relating to loudness; listed as dB.

(dB) a logarithmic representation of gain or loss.

A unit of measure commonly used to describe the sounds around us (abbreviated as dB). It’s based on a logarithmic scale which means a sound that is 3 decibels higher has twice as much energy. 

The decibel (dB) is a unit of a logarithmic scale of power or intensity used to describe the amplitude of sound called the power level or intensity level. The decibel is defined as one tenth of a bel where one bel represents a difference in level between two intensities I1, I0 where one is ten times greater than the other.

a dimensionless unit that describes the ratio of two intensities; the threshold of hearing is commonly used as the reference intensity

A unit used to measure the intensity of sound , on a logarithmic scale based on measurements of sound intensity in watts per square metre and related to a reference 10-12 W/m2 , which is the intensity [..]

A decibel is a unit of measurement that expresses the relative difference in strength of two signals (for an absolute measurement, see dBm). For example, decibels measure how much a signal has been amplified (increased) or attenuated (decreased). A positive decibel value indicates amplification, while a negative value indicates attenuation. To calc [..]

1) Relative measurement for the volume (loudness) of sound. Also used to measure the difference between two voltages, or two currents. See Zero dB. 2) A numerical expression of the relative loudness o [..]

[dB] A unit used to measure sound levels on a logarithmic scale. The ratio of two power levels.

A decibel is a division of a logarithmic scale for expressing the ratio of two quantities proportional to power or energy. The number of decibels denoting such a ratio is ten times the logarithm of th [..]

Unit for expressing a logarithmic measure of the ratio of two signal levels. Further Reading

A logarithmic measure of the ratio of two signal levels: dB = 20 log (Voltage1 / Voltage2) dB = 10 log (Power1 / Power2)Variants on the decibel (dB) used in spectrum-analysis and network-analysis measurements are dBmV absolute voltage level referred to 1 mVdBµV absolute voltage level referred to 1 µVdBm absolute power level referred to 1 mWdBc leve [..]

The decibel (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale. It can be used to express a change in value (e.g., +1 [..]

Decibel is a monthly heavy metal magazine published by the Philadelphia-based Red Flag Media since October 2004. Its sections include Upfront, Features, Reviews, Guest Columns and the Decibel Hall of [..]

Decibel is a monthly heavy metal magazine published by the Philadelphia-based Red Flag Media since October 2004. Its sections include Upfront, Features, Reviews, Guest Columns and the Decibel Hall of [..]

The decibel (dB) is a measure of the ratio between two quantities. Decibel may also refer to: Decibel (company), former name of Quantone, a company providing a music discovery metadata database Decib [..]

The decibel (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale. It can be used to express a change in value (e.g., +1 [..]