phonoscope Meaning, Definition & Usage

Pho"no*scope noun
Etymology
Phono- + -scope.
Definitions
  1. (Physics) (a) An instrument for observing or exhibiting the motions or properties of sounding bodies; especially, an apparatus invented by König for testing the quality of musical strings. (b) An instrument for producing luminous figures by the vibrations of sounding bodies.

Webster 1913