The structure of a speaker
Almost all of the speakers are in principle made up of three different components:
- The coil: A coil is a coiled wire through which current flows. The individual turns are insulated from each other, so that the current flows in all coils one by one. A electromagnetic field. One or a plurality of such coils are located in the center of a speaker.
- The permanent magnet: A permanent magnet is an ordinary Magnet, we know, for example, from the refrigerator magnets. It requires no electric current to its magnetic field to build up. Two of such magnets interact in a speaker with each coil.
- The diaphragm In each speaker diaphragm is located. It consists of either a thin metal or plastic foil, or made of a special cardboard. She is the magnet to the design of the speaker with the duration or with the coils connected.
How does it work with speakers?
So a speaker is not working
- First of all, directed on an ordinary cable of copper electricity wires pulses to the speaker. They are generated by the device that includes the sound source - i.e., from the Computer, Radio or CD-player.
- These current pulses are traversing the coil. Thus, electro-magnetic waves. Due to the different polarity (North pole and South pole) of the coil and the duration of either the coil or the Magnet moved the magnet in motion.
- As a result, the membrane is attached to either the coil or the magnet to swing begins. It pushes the air in front of it and puts it into vibrations - the sound waves caused.
- These sound waves go into the ear to our brain in sounds.
In the next article, we will explain how a Computer works.
