This is an audio version of the Wikipedia Article:
00:02:31 1 History
00:02:40 1.1 Photophone
00:03:27 1.2 Electric wireless technology
00:03:38 1.2.1 Early wireless
00:04:40 1.2.2 Radio waves
00:05:55 1.3 Wireless revolution
00:11:17 2 Modes
00:11:29 2.1 Radio
00:11:50 2.2 Free-space optical
00:13:11 2.3 Sonic
00:13:29 2.4 Electromagnetic induction
00:13:54 3 Services
00:15:50 4 Electromagnetic spectrum
00:16:59 5 Applications
00:17:09 5.1 Mobile telephones
00:17:52 5.2 Data communications
00:21:00 5.2.1 Peripherals
00:22:06 5.3 Energy transfer
00:22:55 5.4 Medical technologies
00:23:35 6 Categories of implementations, devices and standards
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Voice name: en-US-Wavenet-F
“I cannot teach anybody anything, I can only make them think.”
Wireless communication is the transfer of information or power between two or more points that are not connected by an electrical conductor. The most common wireless technologies use radio waves. With radio waves distances can be short, such as a few meters for Bluetooth or as far as millions of kilometers for deep-space radio communications. It encompasses various types of fixed, mobile, and portable applications, including two-way radios, cellular telephones, personal digital assistants (PDAs), and wireless networking. Other examples of applications of radio wireless technology include GPS units, garage door openers, wireless computer mouse, keyboards and headsets, headphones, radio receivers, satellite television, broadcast television and cordless telephones. Somewhat less common methods of achieving wireless communications include the use of other electromagnetic wireless technologies, such as light, magnetic, or electric fields or the use of sound.
The term wireless has been used twice in communications history, with slightly different meaning. It was initially used from about 1890 for the first radio transmitting and receiving technology, as in wireless telegraphy, until the new word radio replaced it around 1920. The term was revived in the 1980s and 1990s mainly to distinguish digital devices that communicate without wires, such as the examples listed in the previous paragraph, from those that require wires or cables. This became its primary usage in the 2000s, due to the advent of technologies such as mobile broadband, Wi-Fi and Bluetooth.
Wireless operations permit services, such as mobile and interplanetary communications, that are impossible or impractical to implement with the use of wires. The term is commonly used in the telecommunications industry to refer to telecommunications systems (e.g. radio transmitters and receivers, remote controls, etc.) which use some form of energy (e.g. radio waves, acoustic energy,) to transfer information without the use of wires. Information is transferred in this manner over both short and long distances.