Telephone
hideThe telephone (from the Greek: τῆλε, tēle, "far" and φωνή, phōnē, "voice") is a telecommunications device that transmits and receives sound, most commonly the human voice. It is one of the most common household appliances in the developed world, and has long been considered indispensable to business, industry and government. The word "telephone" has been adapted to many languages and is widely recognized around the world.
The device operates principally by converting sound waves into electrical signals, and electrical signals into sound waves. Such signals when conveyed through telephone networks — and often converted to electronic and/or optical signals — enable nearly every telephone user to communicate with nearly every other worldwide. Graphic symbols used to designate telephone service or phone-related information in print, signage, and other media include ℡, ☎, ☏, and ✆.
For more information about Telephone, read the full article at
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News tagged with phone
Cell phone mania forces scramble for more airwaves
3 hours ago |
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(AP) -- Wireless devices such as Apple's iPhone are transforming the way we go online, making it possible to look up driving directions, find the nearest coffee shop and update Facebook on the go. All this ...
College asks students to power down, contemplate
Dec 24, 2009 |
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(AP) -- Dianne Lynch wanted to give the students of Stephens College a break from the constant digital communication that pervades their generation. So she asked them to put their phones and computers away ...
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Google sharpens aim on mobile marketing with AdMob
11 hours ago |
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(AP) -- Four years ago, Omar Hamoui was just another ineffectual entrepreneur trying to spruce up his resume in graduate school. Now, he's poised to become Google Inc.'s newest weapon as the company aims to extend its dominance ...
Follow Santa Claus, courtesy Google and NORAD
Dec 24, 2009 |
2.7 / 5 (7) |
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Santa Claus is coming to your town -- and NORAD is tracking him as he drops off presents around the world. The North American Aerospace Defense Command, which monitors the North American airspace, on Thursday ...
Neuroscientists uncover possible basis of short-term memory
Medicine & Health / Neuroscience
6 hours ago |
4.9 / 5 (9) |
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Ben W. Strowbridge, PhD, associate professor of neuroscience and physiology/biophysics, and Phillip Larimer, PhD, a MD/PhD student in the neurosciences graduate program at Case Western Reserve University School of Medicine, ...
Chicken waste turned to watts
Dec 26, 2009 |
3.5 / 5 (13) |
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A Nevada energy developer says it has developed an environmentally clean way of using animal waste from chicken farms across the state to light up homes and offices. Green Energy Solutions wants to convert ...
Glider robot a sleek ocean explorer
Space & Earth / Earth Sciences
10 hours ago |
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The sea was heaving, the skies gray. The captain of the research ship was worried about the weather. About 120 miles off the coast of Spain, three Rutgers University scientists had a narrow window of opportunity to find and ...
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