Glossary D
Glossary D
Decay refers to a hypothesized process of forgetting in which material is thought to erode, break apart, or otherwise disintegrate or fade. Decay occurs when simply the passage of time causes an individual to forget. In the study of sensation and perception, Decay is defined as the decrease in the sound signal that occurs at the end of a tone.
Decibel is defined as a unit that indicates the presence of a tone relative to a reference pressure: dB 20 log (p/po) where p is the pressure of the tone and po is the reference pressure.