For the purpose of this Article, the terms used herein are defined as follows:
Any contrivance now known or hereafter invented, used or designated for navigation or for flight in the air. The word "aircraft" shall include helicopters and lighter-than-air dirigibles and balloons.
Includes the singular and plural, and also means and includes any person, firm, corporation, association, club, partnership, society or any other form of association or organization.
Any machine or device for the amplification of music, the human voice or any other noise or sound. "Sound-amplifying equipment" shall not be construed as including warning devices on authorized emergency aircraft nor any horns or other warning device used only for traffic safety purposes.