Such interference may also be caused by freak weather: atmospheric thunderstorms and tropospheric conditions (causing reception of normally distant and non-interfering stations).
Other sources of interference include industrial, medical scientific and radio control transmitters such as garage door openers, microwave ovens, radio controlled models, radio and television receiver oscillators, induction heating machinery, wireless intercom and diathermy and other medical apparatus. Radio frequency transmitters include power tools, automobile ignitions, appliances, fluorescent and neon lights, microcomputer, power transformers and touch control lamps.
The victims of radio frequency interference include TV sets, am and fm radio receivers, amateur radio receivers, medical equipment, motor vehicle anti-skidding devices, hi-fi audio systems, intercom systems, blasting devices, smoke detectors, video cassette recorders and automobile cruise controls.