P7: MICROPHONES AND LOUDSPEAKERS Flashcards
1
Q
What does a loudspeaker do?
A
converts electromagnetic energy into vibrational energy
2
Q
What effect does a loudspeaker use?
A
motor effect
3
Q
How does a loudspeaker work?
A
-ac sent through coil of wire attached to a diaphragm
-the coil of wire is inside a magnetic field so a force is induced which vibrates the coil
-the diaphragm vibrates which causes air particles to vibrate, creating sound
4
Q
What does a microphone do?
A
converts vibrational energy into electromagnetic energy
5
Q
What effect does a microphone use?
A
generator effect
6
Q
How does a microphone work?
A
-sound waves cause diaphragm to vibrate which causes solenoid to move back and forth
-the solenoid is wrapped around a magnet so a current is induced as a wire is moving through a magnetic field
