(a) Factors. Measurement tolerances shall be allowed to take into account the effects of the following factors:
- (1) The consensus standard practice of reporting field sound level measurements to the nearest whole decibel.
- (2) Variations resulting from commercial instrument tolerances.
- (3) Variations resulting from the topography of the noise measurement site.
- (4) Variations resulting from atmospheric conditions such as wind, ambient temperature, and atmospheric pressure.
- (5) Variations resulting from reflected sound from small objects allowed within the test site.
- (6) The interpretation of the above cited factors by enforcement personnel.