Phonometer
id:
phonometer-304-18259803
title:
Phonometer
text:
A phonometer is an instrument invented by Thomas Edison for testing the force of the human voice in speaking. It consists chiefly of a mouthpiece and diaphragm. Behind the diaphragm is placed a delicate mechanism which operates a 15-inch flywheel by means of which a hole can be bored in an ordinary pine board.
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Phonometer
date created:
date modified:
2015-03-17T14:52:08Z
main entity:
{"identifier":"Q9261232","url":"https://www.wikidata.org/entity/Q9261232"}
image:
fields total:
13
integrity:
13