Xerox Phaser 6180MFP Service Manual page 173

Phaser 6180MFP Multifunction Printer Service Manual
On the other hand, the speaker functions in the reverse manner, transducing
electrical signals back to sound wave. Therefore, its construction is basically
the same as that of a microphone. Electrical signals passing through a coil in
the magnetic field vibrate the coil, which in turn vibrate the air to reproduce
the voice.
These electrical signals are analog signals that fluctuate in response to the
volume of the voice.
String Telephone
Hello
Telephone
Hello
N
S
Diaphragm
Microphone
Electromagnetic Induction
Magnet (N Polarity)
Magnet (S Polarity)
a. The coil in the magnetic field is vibrated.
The magnetic field around the coil is altered.
b. An electric current (alternating current) is generated in the coil.
Hello
Vibration
Hello
Electrical
N
Current
S
Diaphragm
Speaker
b
a
Theory of Operation
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