Telephone

communication · invention · sound · technology

Turns voice to signals. When you speak into a phone, it converts your voice into electronic signals that travel through cables and wires. The phone on the other end converts those signals back into sound so the other person can hear you!

Connects distant people. The word "telephone" comes from Ancient Greek words meaning "far" and "voice." It was invented so people who are too far apart to shout at each other can still have a conversation.

Uses many channels. Telephone signals can travel through different types of communication channels, copper wires, fiber optic cables, and even through the air as wireless signals, all depending on the type of phone you're using.

Enables real conversations. Telephones let two or more people talk to each other instantly, even if they're on opposite sides of the world, making them one of humanity's most important inventions.