What telephone is made of
Transmitting the voice over wires.
- Microphone — has part. The handset microphone turns the voice into an electrical signal.
- Loudspeaker — has part. The earpiece reproduces the other person’s voice.
- Rotary dial — has part. A dial.
- Carbon microphone — has part. For a century, telephone microphones were carbon microphones.
- Telephone exchange — uses. Connecting subscribers.
- Copper — is made of. The wires and coils are copper.
- Bakelite — is made of. The body of classic telephones is Bakelite.