Digital Video (DV) & video edit terms / Eng2Eng v1.0 (web compilation)
A unit of measure applied to both sound and electrical signals, based on a logarithmic scale. Also referred to as "db's."
The standard unit for measuring sound. A subjective scale where one unit equals one increment of “loudness.”
Electronic Music Glossary
A reference for the measurement of sound energy. The minimum change in volume that the human ear can perceive. Named after Alexander Graham Bell. A decibel is 1/10th of a Bel.
Glossary of Electronic Music Terms
A unit of measurement used to indicate audio power level. Technically, a decibel is a logarithmic ratio of two numbers, which means that there is no such thing as a dB measurement of a single signal. In order to measure a signal in dB, you need to know what level it is referenced to. Commonly used reference levels are indicated by such symbols as dBm, dBV, and dBu.
Video Essentials Glossary of Terms
The standard unit used to express gain or loss of power along a signal path. It indicates the logarithmic ratio of output power divided by input power. A power loss of 3 dB is an attenuation of the incoming signal by half of its original value. A 3 dB power loss is equal to a 6 dB voltage loss. [dB = 10 log P1/P2, P = V¨/R, If R is a fixed value, then: dB = 10 log (V1/V2)¨ or dB = 20 log V1/V2. ] This method of scaling levels becomes important because human sensitivity to sight and sound are logarithmic, which accounts for our large dynamic range capability.
Sound Escape Glossary of Terms
The standard unit of measuring differnces in the expression of relative power or amplitude. One dB is the smallest change in loudness most people can detect. A 1 dB difference is barely noticeable, while 10 dB higher volume will sound twice as loud. Each 3 dB increase in volume level requires double the amplifier power.