1. Computer Applications ||
Computer Technology History
Of the History of speakers
By Acacia Ross 9th Grade
Period 1
Mr. Burns
Emery High School, Emeryville
CA

2. A simple type of electronic
loudspeaker was developed
by Johann Philipp Reis - a
teacher at Friedrichsdorf,
Germany.
Alexander Graham Bell
also tried to produce a
speaker based on Reis's
work.
1877-1921 - Various
inventors and engineers
played with the idea of
the electrodynamic
loudspeaker but could
only create rough
distorted sounds.

3. the electromagnet part of the
speaker was invented early on in the
1860s.
C.W. Rice and E.W.
Kellogg 1900’s
The recent developments in vacuum
tubes in the 1910shelped to do
sophisticated control of frequencies
and power regulation.

4. Planar
magnetic
speaker
1843
Johann Philipp Reis
installed an electric
loudspeaker in his
telephone in 1861.
By Ernst
Siemens in
1877

5.  EdisonTech Center.org
 History andTypes of Loudspeakers
 http://www.edisontechcenter.org/speakers.ht
ml
 Wikipedia.org
 Loud speakers
 http://en.wikipedia.org/wiki/Loudspeaker