Description: Characterization of a certificate with respect to the standard or guideline on the basis of which it was created.; Name: Certificate type
Description: classification of a certificate according to the standard or directive on the basis of which it was issued; Name: type of certificate
Description: ten times the logarithm to the base 10 of the ratio of the sound power of a source, p, to a reference value, p0, expressed in decibels; Name: sound output level