singing flame

Wiktionary

1. n. A flame, as of hydrogen or coal gas, burning within a tube and so adjusted as to set the air within the tube in vibration, causing sound; a chemical harmonicon.

GNU Webster's 1913

1. (Acoustics) a flame, as of hydrogen or coal gas, burning within a tube and so adjusted as to set the air within the tube in vibration, causing sound. The apparatus is called also chemical harmonicon.