Microphones (AQA GCSE Physics): Flashcards
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Practise the cards
9 cards from this deck
What do dynamic microphones convert sound waves into?
What do dynamic microphones convert sound waves into?
Electrical current
The induced current is ___ to the sound signal
The induced current is ___ to the sound signal
Proportional
Fixed component at centre of dynamic microphone
Fixed component at centre of dynamic microphone
Fixed magnet
What sound waves create in dynamic microphones
What sound waves create in dynamic microphones
Pressure variations
What do pressure variations do to the coil?
What do pressure variations do to the coil?
Move it back and forth around the magnet
What induces current in the coil?
What induces current in the coil?
Coil moving through magnetic field
Effect causing current induction in dynamic mic
Effect causing current induction in dynamic mic
Generator effect
How does the induced current vary?
How does the induced current vary?
With the sound wave
Where induced current is transmitted to
Where induced current is transmitted to
Loudspeaker or recording device