The Clapper
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The Clapper is a sound-activated electrical switch,<ref>Template:Cite news</ref> sold since 1984 by San Francisco, California based Joseph Enterprises, Inc. Joseph Pedott marketed the clapper with the slogan "Clap On! Clap Off! The Clapper!".<ref>Template:Cite book</ref>
The Clapper plugs into a U.S.-type electrical outlet, and allows control of up to two devices plugged into the Clapper.<ref>Template:Cite news</ref> An upgraded model, known as the Clapper Plus, includes a remote control function in addition to the original sound-based activation.<ref name="Gizmodo">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Although meant to activate by clapping, The Clapper can inadvertently be triggered by other noises like dogs barking for example.<ref>Template:Cite news</ref>
PatentEdit
The smart Clapper was invented by Carlile R. Stevens and Dale E. Reamer, and issued U.S. Patent #5493618, had its application filed on 1993-05-07 and was granted on 20 February 1996.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>