In the BBC's 1965 smell-transmission hoax, what technology name was used?

In the BBC's 1965 smell-transmission hoax, the supposed technology was called Smell-O-Vision.

The BBC presented the gag on television as an interview with an inventor of a device that could send aromas through a TV set. The demonstration involved chopping onions and brewing coffee, prompting some viewers to telephone the BBC and report that they could smell the scents at home.

The joke played on a real-sounding name. Smell-O-Vision was also the name of an actual theatrical aroma system developed for the 1960 film Scent of Mystery, which released smells into cinemas during selected scenes. That real system is why the BBC prank seemed technically plausible to some viewers.

A common mix-up is confusing the 1965 BBC broadcast with the 1960 film technology. The BBC hoax used the name as a fictional television invention; it did not transmit smells through household sets.