- - a fraction whose denominator is a power of ten and whose numerator is expressed by figures placed to the right of a decimal point.
12/100 = .12; 1/10 = .01; 1/2 = 50/100 = .50
[DECI = tenth, 1/10 + BEL = a unit of volume or unit of measure of electrical signals]
- named after Alexander Graham Bell, a base-ten logarithm of the ratio between two signals,
- for every additional bel on the decibel scale, the signal is ten times stronger.