Whoopee cushion

The whoopee cushion is a joke article in which it is an inflatable hollow body which now often made ​​of plastic and is filled via a valve so that the air charge then can not escape independently. When sudden escape of air through an external load a flatulenzartiges noise is generated. By the pressure increase in the interior air is pressed out of the valve. According to the Bernoulli's law thereby creating a negative pressure in the valve and the air flow is interrupted by the ambient air pressure again.

The Whoopee Cushion is designed to fool unsuspecting people who inadvertently sit on it and can therefore apply the necessary pressure by their weight, embarrassed. It is stored, for example, camouflaged on seating.

The first consisted of two identical Furzkissen, balloon -shaped rubber membranes which have been bonded together, except for the opening at the typical location for a balloon at the edge. There, the gap through which the Furzkissen is filled arose and has been compressed due to its adhesive properties, so that the filling was contained.

Nowadays whoopee cushion are usually manufactured with a foam filling and a mechanical valve. Reducing the pressure on the hollow body, so relaxing the foam filling and leads to the cushion through the valve resumes air and thus again a noise may be generated without intervention of the user. Also rapid sequences of Furzgeräuschfunktion are possible in this way.

According to the Guinness Book of World Records, the largest ever joint whoopee cushion seats took place with 3164 people in Illinois.