Bible Dictionaries
Phonoscope

Webster's Dictionary

(1):

(n.) An instrument for observing or exhibiting the motions or properties of sounding bodies; especially, an apparatus invented by Konig for testing the quality of musical strings.

(2):

(n.) An instrument for producing luminous figures by the vibrations of sounding bodies.

Bibliography Information
Webster, Noah. Entry for 'Phonoscope'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/phonoscope.html. 1828.