Started with Tracy Austin I recall. Heard Halep last night - disgusting artificial contrived just a tactic IMHO. Crowds hate it. Authorities should act. Some sort of audible response at the instant of exertion should be allowed but a "gruntometer" could easily be devised to time the sound and penalise players still making noise at a certain point as the ball approaches opponent. I would suggest as ball crosses net - at that instant you cease grunt-screech whatever shriek.
