Overview of Communication Devices - JSS3 Basic technology Lesson Note
- Telephones: Devices that convert sound into electrical signals for transmission over distances. They allow real-time voice communication.
- Radios: Transmit audio signals through electromagnetic waves. Used for broadcasting music, news, and emergency alerts.
- Computers: Multifunctional devices capable of processing, storing, and transmitting data. They support email, video conferencing, and internet browsing.
- Smartphones: Combine the functions of telephones and computers, enabling calls, messaging, internet access, and various applications.