Look up: dB (Decibel)

1. dB (Decibel)
   A unit used for measuring voltage, current or power. The decibel is often used to measure differences in sound pressure level or relative loudness
   Found on http://www.musiconmypc.co.uk/art_glossar
   
   
2. Db (Decibel)
   A logarithmic measure of sound pressure level, a 'Decibel' is one tenth of a 'Bel'. To put this in human terms, someone with pretty good hearing will be able to pick up sounds from @ 0
   Found on http://www.traditionalmusic.co.uk/music%
   
   
3. dB (Decibel)
   A logarithmic representation of the ratio between two signal levels
   Found on http://www.amplicon.co.uk/info/glossary.
   
   
4. dB (Decibel)
   20 times the log to the base 10 of the ratio of two voltages. Every 20 dBs correspond to a voltage ratio of 10, every 10 dBs to a voltage ratio of 3.162. For instance, a CMR of 120 dB provides voltage noise rejection of 1,000,000/1. An NMR of 70 dB provides voltage noise rejection of 3,162/1.
   Found on http://www.flowmeterdirectory.com/flowme