I would argue the spectra of human vocal speech is more constrained than the far wider spectra of radio waves. What most places do is just limit sound beyond a

I would argue the spectra of human vocal speech is more constrained than the far wider spectra of radio waves. What most places do is just limit sound beyond a certain level rather than requiring a license to play electronic sounds or talk. In the end most forms of communication are constrained -- you can only cut down so many trees or tree alternatives for newspaper, so I don't think this argument about licensing holds as presented.