You Know The Voice: Howard Morris (1955)

 Long before Jet Screamer or Ernest T. Bass became 60's cultural icons, Howard Morris was part of Sid Caesar's ensemble on Your Show of Shows and Caesar's Hour. In 1955, Caesar, Morris, & Carl Reiner formed the parody combo, The 3 Haircuts, mocking the growing rock & roll scene.

Here, the Haircuts perform "You Are so Rare" and "Flippin' Over You":

So Morris was already well versed in novelties by the time he was cast as Jet Screamer on The Jetsons seven years later. There's another clip floating where Morris wears a beanie that looks suspiciously familiar to anyone familiar with another of his cartoon roles.....!