Description: Logarithm of the ratio of a given sound pressure to a reference sound pressure. The sound pressure level in decibels is the same as the 20-fold logarithm of this ratio; 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: For a given operating resource, the greatest temperature, not ever to be exceeded, of materials or measuring substances above which the resource cannot be operated without permanent changes in its characteristics; Name: 	Max. work temperature