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RE: Voice coil

108.28.89.140

Lew

In Reply to: RE: Voice coil posted by Geoffkait on August 06, 2024 at 13:46:13

In an electromagnetic driver, such as the one you're describing, the audio signal is per se AC. Because it is alternating current, it is in effect moving back and forth (if you will) in the stationary magnetic field of the permanent magnet structure, which is held fast by the basket. Thus the electromagnetic force developed by the audio signal in the coil drives motion of the diaphragm, because the coil is attached to the diaphragm. The polarity of that current is changing according to the signal driving it; that pushes and pulls the diaphragm, in one direction or the other. Excursions of the diaphragm in both directions (in and out) are responses to forces in both directions.

Follow Ups:

You're close. Very close. - Geoffkait 02:23:38 08/08/24 (4)
A magnetic field is created when current (moving electrons) travels though a coil. That magnetic field is what interacts with the large magnet of the speaker and makes the diaphragm move. Electromotive force is what pushes the electrons, not the diaphragm. In reality electromotive force is not a force, units are volts. Does that surprise you?
Current is a calculated quantity, it's a scalar, so has no direction. The only thing that's moving is the electrons, one millionth of an inch at a time.

Edits: 08/08/24 08/08/24
- RE: You're close. Very close. - Tre' 17:57:01 10/13/24 (0)
  "a current of one ampere is one coulomb of charge going past a given point per second"
  How is that not direction?
  
  Tre'
  Have Fun and Enjoy the Music
  "Still Working the Problem"
- RE: You're close. Very close. - Lew 20:35:59 08/08/24 (2)
  So many wrongs it's silly to go further. To anyone else, there are many educational videos on the work of Maxwell and Faraday that are worth consulting. My main point was to refute the notion that the "electron" on its way back to the amplifier is per se a misconception.
  - So many wrongs it's silly to go further. - Jotaro 16:49:41 10/19/24 (0)
    Best not to even start with that one.
    
    Sometimes its just best to ignore.
    
    J.
  - RE: You're close. Very close. - Geoffkait 22:24:09 08/08/24 (0)
    Whatever. Thanks for trying.

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