For the purposes of this chapter, the following terms are defined as follows:
(a) "Decibel" means a unit of measurement of the intensity of sound (the sound pressure level).
(b) "Impact noise analyzer" means an instrument used in conjunction with the sound level meter to measure the peak intensities of short duration sounds.
(c) "Octave band" means 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.
(d) "Octave band analyzer" means an instrument used in conjunction with a sound level meter to measure sound in each of eight octave bands.
(e) "Sound level meter" means an instrument standardized by the American National Standards Institute or its successor body, which is used for measurement of the intensity of sound and which is calibrated in decibels.