As used in this chapter, the following terms shall have the meanings indicated:
Any machine or device for the amplification of the human voice, music or any other sound. "Sound-amplifying equipment," as used herein, shall not be construed as including standard automobile radios when used and heard only by occupants of the vehicle in which installed, nor warning devices on authorized emergency vehicles nor horns or other warning devices on other vehicles and only for traffic safety purposes.
Any motor vehicle or horse-drawn vehicle having mounted thereon or attached thereto any sound-amplifying equipment.