Noise caused in the performance of emergency work for the immediate safety, health, or welfare of the community or individuals of the community, or to restore property to a safe condition following a public calamity shall not be subject to the provisions of this chapter. Nothing in this section shall be construed to permit law enforcement, ambulance, fire, or other emergency personnel to make excessive noise in the performance of their duties when such noise is clearly unnecessary. (Ord. 1275 § 1, 1982)