In the early days of musical recordings, singers and instruments needed to be loud and direct enough to project the music in the acoustic horns or primitive recording equipment. The violin, in particular, was an instrument that needed extra help to make its way onto the wax cylindars. In 1899, electrical engineer, John Matthias Augustus Stroh, patented a violin that used a bridge that excited an internal membrane which was fed into a brass horn. The sound was more piercing and could be directed straight into the recording horn.
In 2021, West Virginia tinkerer, musician and all around good guy, Jim Morris re-created the famous Stroh violin with violin parts, a soup can and a bugle he found in the basement!
Here's the video story and demo by Morris: