In the British Punch and Judy show, Punch speaks in a distinctive squawking voice, produced by a contrivance known as a "swazzle" or "swatchel" which the professor holds in his mouth, transmitting his gleeful cackle. This gives Punch a vocal quality as though he were speaking through a kazoo. Joan's name was changed to Judy because "Judy" was easier to enunciate with the swazzle than "Joan". So important is Punch's signature sound that it is a matter of some controversy within Punch and Judy circles as to whether a "non-" show can be considered a true Punch and Judy Show. Other characters do not use the swazzle, so the Punchman has to switch back and forth while still holding the device in his mouth.