-- card: 13551 from stack: in -- bmap block id: 0 -- flags: 0000 -- background id: 3551 -- name: -- part contents for background part 3 ----- text ----- decibel (dB) -- part contents for background part 4 ----- text ----- a scale used to measure relative loudness levels that compensates for the non-linearity of perception. -- part contents for background part 16 ----- text ----- 177