I was searching for something entirely different

[doodab]

but this is what I found....

The World Famous Pooter Tooter - Buy here!

with a little practice, it produces many types of flatulence sounds from the short high pitched squeaker to the long drawn out fart. It truly sounds exactly like the real fart sounds we all produce. Not electronic sounding or repetitious like the battery operated units. Since 1981 The Pooter Tooter fart machine has been used on countless TV shows as a realistic sound effect, and by many celebrities on talk shows, business meetings, social events and my all time favorite...in the elevator.

[xoggoth]

Fairly old tech. At the last tedious family gathering one of my nephews put an electronic fart machine under my chair. It was fairly funny on the first occasion.