Wiki has a couple good articles that will help you.
Look up "Speaker"
Look up "Microphone"
Every phone has one of each and both involve magnets.
Magnets are used in telephones' speakers to make vibrations of air (sounds)
Telephone, television, radio, and Internet all use magnets to aid the communication.
Telephone, television, radio, and internet all use magnets to aid the communication.
the testicle
how can magnets be used to help with recycling
how can magnets be used to help with recycling
The telephone receiver contains the earpiece. Virtually all receivers also contain the transmitter, which is the microphone that picks up the user's voice.
magnets can help blood circulate around bones
magnets help us because magnets can help power your refrigerator.
Telephone, television, radio, and Internet all use magnets to aid the communication.
computers telephone recievers refridgerator etc
It has not been scientifically proved that magnets can help heal bones.