• Английский язык
• 5–6 класс

A telephone is a device for sending voices or other information between people who are far apart. When a person speaks into a phone, its microphone changes sound waves into electrical or digital signals, and a speaker turns incoming signals back into sound. In a mobile call, the phone sends radio signals to a nearby cell tower, which passes them through a network towards the other person’s phone. A landline phone usually sends signals through cables, while a smartphone can also connect to the internet using Wi-Fi or a mobile network. Modern smartphones combine calling with messaging, maps, cameras, games, and many other applications.

Ключевые факты

1. Alexander Graham Bell received a US patent for his telephone in 1876; the patent number was 174,465.
2. On 3 April 1973, engineer Martin Cooper made the first public handheld mobile-phone call in New York City.
3. The first commercially available handheld mobile phone, the Motorola DynaTAC 8000X, went on sale in 1983.
4. The word “telephone” comes from Greek roots: “tele” means “far,” and “phone” means “sound” or “voice.”
5. The first iPhone was announced by Steve Jobs on 9 January 2007 and went on sale in the United States on 29 June.
6. In English, “cell phone” is common in the United States, while “mobile phone” is widely used in the United Kingdom.