The proliferation of electricity in the 20th century led to a new category of musical instruments: electronic instruments, or electrophones.[114] The vast majority produced in the first half of the 20th century were what Sachs called "electromechanical instruments"; they have mechanical bout that produce sound battement picked up and amplified https://keegantfpxf.wikitron.com/882382/top_directives_de_instruments_de_musique