P7: MICROPHONES AND LOUDSPEAKERS Flashcards

1
Q

What does a loudspeaker do?

A

converts electromagnetic energy into vibrational energy

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2
Q

What effect does a loudspeaker use?

A

motor effect

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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

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4
Q

What does a microphone do?

A

converts vibrational energy into electromagnetic energy

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5
Q

What effect does a microphone use?

A

generator effect

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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

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