What is the full form of dB?

The full form of dB is Decibel. The decibel (dB) is a logarithmic number for expressing the ratio of a physical quantity, usually power or intensity, to a specified or implied reference level.

Decibel is the unit of sound. Its symbol is ‘dB’. We can define decibel as a unit of measurement used to express the ratio of one value of a power or field quantity to another on a logarithmic scale, the logarithmic quantity being called the power level or field level, respectively.

What is the Decibel Scale?

The human ear has the capacity to adapt to a wide variety of sound levels. As a result, rather than using a linear scale, a logarithmic scale is employed to depict sound levels in more flexible numbers. The decibel scale, or dB scale, is the name for this scale.

• On the decibel scale, 0 dB is the smallest audible sound.
• A sound 10 times more powerful is 10 dB and sound 100 times more powerful than near total silence is 20 dB.
• A sound 1,000 times more powerful than near total silence is 30 dB.