ToC
42-211

Definitions

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.

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