Loudspeakers & Headphones (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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Practise the cards
13 cards from this deck
What do loudspeakers convert?
What do loudspeakers convert?
Electrical signals into sound
How do loudspeakers relate to microphones?
How do loudspeakers relate to microphones?
They work in reverse of microphones
Where does current flow in a loudspeaker?
Where does current flow in a loudspeaker?
Into a coil of wire
What provides the magnetic field in a loudspeaker?
What provides the magnetic field in a loudspeaker?
A permanent magnet
What causes the coil to move in a loudspeaker?
What causes the coil to move in a loudspeaker?
Interaction between the coil's and magnet's magnetic fields
What is the coil attached to in a loudspeaker?
What is the coil attached to in a loudspeaker?
A cone (or diaphragm)
How is sound created by a loudspeaker?
How is sound created by a loudspeaker?
The cone creates pressure variations in the air
How do headphones differ from loudspeakers?
How do headphones differ from loudspeakers?
Function similarly but on a smaller scale
What is the role of the coil of wire?
What is the role of the coil of wire?
Where the electric current flows
What is the role of the magnet?
What is the role of the magnet?
Provides a magnetic field to interact with the coil
What is the role of the diaphragm?
What is the role of the diaphragm?
Moves to create sound waves
How do dynamic headphones work?
How do dynamic headphones work?
Based on moving coil and magnet principle
How do electrostatic headphones work?
How do electrostatic headphones work?
Use electrically charged plates and a diaphragm