sentence: Harmonicas produce their musical sounds from the vibrations of reeds in the harmonica's metal case.
sentences_before: A 'harmonica' is small musical instrument that is played with the mouth by blowing into holes in its side. Harmonicas are cheap and easy to play.
sentences_after: Harmonicas are used in blues music, folk music, rock and roll music, and pop music. A special type of harmonica, the chromatic harmonica, is used in jazz and classical music. Each key can play a different range of notes.
concept_name: harmonica
headings: Harmonica
categories: Woodwind instruments