From Wiktionary, the free dictionary
polyphon (plural polyphons)
- A wooden-cased music box of a kind typically manufactured in Germany.
- The Stuff of Radio, by Lance Sieveking Cassell and Company Limited: 1934.[1]
- (Polyphon as manufacturer) Creativity and Innovation in the Music Industry, by Peter Tschmuck. Springer: 2006, page 66.[2]