I remember reading an article of how the “psychic kung fu” weirding way would have been impractical with the effects of the time, and looked silly – hence the choice of sound. Then again, it was okay by time they made the miniseries (post Matrix). I don’t fault the movie for taking artistic license with the book. Jodorowsky’s looked awesome and he was going to reinvent the whole thing. The sound weirding modules make the Atreides threat to the Emperor and the Sadaukar concrete, and also Paul’s transcendence (“Maudib no longer needs the weirding module!”).
