Chapter 4.15 UNLAWFUL NOISES AND NOISE POLLUTION This chapter is included in your selections. Sections: 4.15.010 Unlawful noises designated. 4.15.020 Horns and signaling devices. 4.15.030 Instruments, machines, and amplifying devices. 4.15.040 Exhausts. 4.15.050 Defect in vehicle or load. 4.15.060 Drums. 4.15.070 Pile driver and hammers. 4.15.080 Lawn mowers and leaf blowers.