Decibel: (Symbol

Decibel (Symbol: dB) is a logarithmic unit that indicates ratio or gain. Decibel is used to indicate the level of acoustic waves and electronic signals. The logarithmic scale can describe very big or very small numbers with shorter notation. A decibel (dB) is a unit of measurement used to express the relative intensity of a sound. It is a logarithmic unit, which means that it expresses the ratio of two power levels as a multiple of 10. The decibel scale is based on the human ear’s response to sound. Logarithmic unit used to describe ratios of signal levels - like power or intensity - to a reference level. The deciBel uses the base ten logarithms, i.e. those commonly used within mathematics. By using a logarithmic scale, the deciBel is able to compare quantities that may have vast ratios between them. The deciBel, dB or deci-Bel is actually a tenth of a Bel - the Bel is a unit that is seldom used.