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A decibel (dB) has meaning only when compared a quantity (P1, V1, or I1) with a reference (P0, V0, or I0). Since it is a ratio of two like quantities, it is dimensionless.
For a power ratio, power gain = 10 * log10(P1/Po) in [dB].
For a voltage ratio, voltage gain = 20 * log10(V1/Vo) in [dB].
For example, when P1 = 100 * P0, the power gain = 10 * log10(100) [dB] = 20 dB.
What else can I help you with?
What type of scale is the decibel scale?
The decibel scale is a logarithmic scale. Scroll down to related links and look at "Decibel - Wikipedia" and "Sound level meter - Wikipedia".
You multiply or dividing the decibels by the decibels?
There is no point in doing either one of these. A decibel, being the log of a ratio, is added to or subtracted from another decibel.
What instrument measures the volume of sound?
a decibel meter.
What is the decibel a unit of?
Decibel is no real unit, it is a pseudo unit. The decibel (dB) is a logarithmic unit that indicates the ratio of a physical quantity. A change in voltage ratio by a factor of two is approximately a 6 dB change. A change in power ratio by a factor of two is approximately a 3dB change.
What is the recommended decibel level for the human ear?
60 i think
What is the Welsh for 'decibel'?
The Welsh word for 'decibel' is desibel.
What are the uses of DECIBEL?
What are the uses of DECIBEL?
How much louder is a 60 decibel sound than a 40 decibel sound?
A 60 decibel sound is 10 times louder than a 40 decibel sound. Decibels follow a logarithmic scale, where an increase of 10 decibels represents a sound that is perceived as being 10 times more intense.
How do you use the word decibel in a sentence?
How do you use the word decibel in a sentence?What is decibel used for?
How is the decibel abbreviated?
The abbreviation for decibel is dB.
What is the subunit of Decibel?
The bell is a large unit, so a subunit, a decibel, is usually used. There is no subunit of decibel.
What is another word for decibel?
another name for decibel
What is a decibel in terms of sound?
A decibel is a measure for sound.
How is decibel abbreviated?
Decibel is abbreviated as "dB."
What does a decibel have to do with sound?
A decibel is the unit of measuring the level of sound.
What is the decibel of a car horn?
What is the decibel level of a car horn?
When was Miss Decibel created?
Miss Decibel was created in 1987.
