You can use a flame as a triode to build an amp https://www.youtube.com/watch?v=-aAwyUoawkc https://www.youtube.com/watch?v=-aAwyUoawkc Tangentially, you can u

You can use a flame as a triode to build an amp https://www.youtube.com/watch?v=-aAwyUoawkc https://www.youtube.com/watch?v=-aAwyUoawkc Tangentially, you can use a flame to emit sound directly http://onetuberadio.com/2018/07/02/flame-speaker-science-fair-project/ http://onetuberadio.com/2018/07/02/flame-speaker-science-fai...