(a) "Shooting range" shall mean an outdoor range equipped with targets for use with firearms and shall include, but not be limited to, all rifle, pistol and shotgun ranges.
(b) "A-weighted sound level" shall mean the sound pressure level measured by the use of an instrument with the metering characteristics and A-weighting frequency response prescribed by sound level meters using the impulse response mode.
(c) "Sound pressure level" shall mean twenty times the logarithm to the base ten of the ratio of the root mean squared pressure of a sound to a reference pressure of twenty micropascals. The unit applied to this measure shall be the decibel (dB).
(d) "Small arms" shall mean projectile firearms of small caliber, including rifles, pistols, and shotguns.