AM Radios are fantastic low-cost detectors of dirty electromagnetic environments.
They works at 530–1700 KHz
A range that overlaps with the electromagnetic noise produced by electric vehicle components, especially the inverters, motors & DC–DC converters.
Those high-current parts inside the car generate electromagnetic interference (EMI) that leaks into the AM band, creating the loud buzzing/static you hear when you try to tune a station.
If your radio picks up loud static or hum in certain spots, that’s the EMF noise becoming audible.
