standard dynamic loudspeaker that we know of today was developed
in the 1920's and uses a magnetic field to move a coil or magnet
which is connected to a diaphragm. There are other kinds of
speakers/sound amplification devices besides the standard round
speaker, in this article we cover just a few of the entire list:
Horns, Piezoelectric speakers, Magnetostrictive speakers,
Electrostatic Loudspeakers, Ribbon and Planar Magnetic
Loudspeakers, Bending Wave Loudspeakers, Flat Panel
Loudspeakers, Heil Airl Motion Transducers, Plasma Arc Speakers,
and Digital Loudspeakers. The dynamic loudspeaker in the photo
above outperforms many other types of speakers, and is lower
cost to produce. For these reasons it is the most popular. We
will outline some other types in this page. were the earliest
form of amplification. Horns do not use electricity. Thomas
Edison, Magnavox, and Victrola all developed advanced and well-
performing horns from 1880 to the 1920's. The problem with horns
is that they could not amplify the soun