Description: Sound pressure level uses a logarithmic scale to represent the sound pressure of a sound relative to a reference pressure.; Name: acoustic pressure level
Description: Ten times the logarithm to the base 10 of the ratio of the square of the sound pressure, p, to the square of a reference value, p0, expressed in decibels; Name: Sound pressure level
Description: language-independent, unambiguous code of a class within a class system; Name: code of class