What do loudspeakers and headphones use to produce sound?
variations in an AC
Why does the speaker cone move?
The current travels through a coil and experiences a force due to the magnetic field.
Why does the speaker cone oscillate?
because the current is alternating, the direction of the force alternates
How does increasing electrical power affect sound?
It increases the force on the coil, producing larger cone oscillations, with a higher attitude → louder sound.
How is the frequency of sound related to the current?
Sound frequency = frequency of the alternating current.
how could the pitch of the sound from a speaker be increased
u increase the frequency of the alternating current:
Higher AC frequency → faster cone vibrations → higher-pitched sound.
How does speaker size affect sound?
- Large cones = slower oscillations → better for low-pitched sounds.
- Small cones = faster oscillations → better for high-pitched sounds.
