How does the ionophone work?

How does the ionophone work? I have prepared a little explanation for this device, which is assembled from a lowercase transformer with a voltage multiplier and a field-effect transistor. The control is carried out by a generator with the possibility of FM modulation. The power supply is 30 V for 6 A. I will put the notes on my Telegram channel. Sincerely, Yuri Kovalenok
#physics #science #physicsfun #engineering #education #jurij0001 #yurikovalenok

[@user-yu3ko5vk9f]

Звук был и при обрыве плазмы..?..