Swazzle

A swazzle (also swozzle, schwazzle or swatchel) is a device used to produce the distinctive shrill voice of Punch in a Punch and Judy show. It consists of a cotton tape "reed" kept taut between two curved strips of metal, held in the mouth of the professor (performer).

The design of the swazzle was once a secret guarded by the professors and only taught to those with a genuine respect for and interest in learning the performance of Punch and Judy puppetry. The device can now be bought from joke and magic shops although those made according to the traditional design are smaller and are generally considered superior.