It is indeed possible. One can induce sound via microwave RF to the head. It will not replace earphones but it can be done. In the 1950s someone also used RF to couple voice into heads. Interestingly the technology died out as far as the public knows. I ought to go track it down again.- ah yes here
Have read that voice to skull is already possible. Maybe this helps somehow?
Maybe it alters emotional states?
It is indeed possible. One can induce sound via microwave RF to the head. It will not replace earphones but it can be done. In the 1950s someone also used RF to couple voice into heads. Interestingly the technology died out as far as the public knows. I ought to go track it down again.- ah yes here
http://www.neoneurophone.com/
And one can built your own version of it to experiment with the phenomenon:
https://www.eeweb.com/hear-with-ultrasound-using-a-flanagan-neurophone/
Such sound inducing is patented too:
https://www.bigbrotherwatchingus.com/official-mind-control-patents.html
Finally, for those people stable enough to handle it, read this site:
https://newsinsideout.com/2017/04/ii-z-rock-star-entrepreneur-tia-founder-gary-owens-explains-neurophone-can-enhance-consciousness-masons-transhumanist-agenda-misuse-v2k-voice-skullartificial-telep/