Audio

How does a loudspeaker work?

Here is a demonstration I found on YouTube which I think is very useful to show the components of a loudspeaker and how it works.

http://www.youtube.com/watch?v=3ZQqCyRQFB4&
The electrical current flowing through the voice coil creates a magnetic field that interacts with the permanent magnet’s field. As the signal changes polarity, this magnetic interaction forces the voice coil and cone back and forth creating sound waves we can hear.

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