monochord
/ˈmɑnəˌkɔrd/
noun
- An ancient musical instrument with a single string stretched over a soundbox, used for studying musical intervals and tuning.
- The music teacher used a monochord to demonstrate how changing the string length changes the pitch.
- The physicist built a monochord to test the relationship between string tension and frequency.
- In the museum, we saw a replica of a Greek monochord that was used to study harmony over two thousand years ago.