jews harp

/JH UW1 Z AA0 R P/
noun
  1. 1

    A musical instrument consisting of a flexible metal or bamboo “tongue” attached to a frame. This tongue is placed in the performer’s mouth and plucked with the finger to produce a note of constant pitch. Melodies can be created by changing the shape of the mouth and causing different overtones.

Source: https://en.wiktionary.org/wiki/Jew's%20harp, https://en.wiktionary.org/wiki/jews%20harp