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This version was saved 9 years, 10 months ago View current version     Page history
Saved by Omer Asmat
on April 20, 2011 at 5:53:37 pm




A speaker is a device that converts electrical signals to sound waves. It is a transducer; a transducer is a device that converts one form of energy to another. Speaker may be referred to just one transducer or an integration of many transducers and filters.



Table of contents:

  1. History

          1.1 Invention of the first Loudspeaker

          1.2 Development of the modern loudspeaker

     2. What is a loudspeaker?

     3. Design

     4. Physics

     5. Resources




Invention of the first Loudspeaker:


In 1867, Alexander Graham Bell constructed the first ever electrical speaker device for the purpose of building a telephone. In 1877, Ernst Siemens improved upon Bell's invention and invented a more advanced electrical loudspeaker. During the period of 1867 to 1891, physicists such as Nikola Tesla  were working upon improving this idea of the loudspeaker.



Alexander Graham Bell,  Nikola Tesla and Ernst Siemens (left to right) were key individuals who contributed to the development of the modern speaker.


Invention of the modern loudspeaker:

In 1898, Oliver Lodge established the modern idea of moving-coil.


What is a loudspeaker?


A loudspeaker is a device which converts electricity into sound which is amplified through a device. Commonly used loudspeakers are radios and stereo systems.




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