How do certain regular objects play audio with no speakers if a radio transmission is powerful enough?

Question

I saw a TIL post talking about a radio station that transmitted so much power that people nearby could hear it in their furniture. How is that even possible? I though speakers were made to that audio could be correctly relayed yet a spring mattress can play audio?

In: 2

Answer 1

A radio signal is literally the sound wave, but “riding” a carrier wave. Tune into that wave using a metal antenna that vibrates at the same frequency, so you are “riding” alongside it, by filtering out other frequencies, then amplify the sound, and that’s a radio. Crank the power up enough and that wave will be so powerful, the antenna itself will vibrate loud enough to hear, even if that “antenna” is a pot or a filling.