Microphones (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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What do dynamic microphones convert sound waves into?
What do dynamic microphones convert sound waves into?
Electrical current
Relationship between current & sound signal in dynamic microphone
Relationship between current & sound signal in dynamic microphone
Current is proportional to sound signal
Component at the centre of a dynamic microphone
Component at the centre of a dynamic microphone
Fixed magnet
What do sound waves create in dynamic microphones?
What do sound waves create in dynamic microphones?
Pressure variations
Effect of pressure variations in a dynamic microphone
Effect of pressure variations in a dynamic microphone
Coil moves back and forth around the magnet
What does the coil move through in a dynamic microphone?
What does the coil move through in a dynamic microphone?
Magnetic field
What happens when the coil moves through the magnetic field?
What happens when the coil moves through the magnetic field?
Current is induced in the coil
Physics effect that causes current induction in a microphone
Physics effect that causes current induction in a microphone
Generator effect
How does the induced current vary in a dynamic microphone?
How does the induced current vary in a dynamic microphone?
It varies with the sound wave
Where is the induced current transmitted to?
Where is the induced current transmitted to?
Loudspeaker or recording device