42-411 - Definitions

LAST AMENDED
6/6/2024

For the purposes of this Section, the following terms are defined:


Decibel

A “decibel" is a unit of measurement of the intensity of sound (the sound pressure level).


Impact noise analyzer

An “impact noise analyzer” is an instrument used in conjunction with the #sound level meter# to measure the peak intensities of
short duration sounds.


Octave band

An “octave band” is one of a series of eight bands which cover the normal range of frequencies included in sound measurements.
Such #octave bands# serve to define the sound in terms of its pitch components.


Octave band analyzer

An “octave band analyzer” is an instrument used in conjunction with a #sound level meter# to measure sound in each of eight
#octave bands#.


Sound level meter

A “sound level meter” is an instrument standardized by the American Standards Association, which is used for measurement of
the intensity of sound and is calibrated in #decibels#.