Johannes Matthias Augustus Stroh (7 May 18282 November 1914) was a German-born English engineer and inventor. He invented sound-recording and sound-producing devices including a musical instrument known as the Stroh violin.

Stroh was born in Frankfurt-am-Main, Germany. After school, he became an apprentice to a clockmaker, with a talent for mechanical devices. In 1851, he visited the Great Exhibition in Hyde Park,