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
Wikipedia.
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News tagged with phone
GSM system about to be compromised
Dec 08, 2009 |
3.8 / 5 (21) |
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(PhysOrg.com) -- Research scientists in California and elsewhere are deliberately setting out to compromise the mobile phone system used by around three billion people. The system uses Global System for Mobile ...
Researchers create cell phones for sign language
Dec 02, 2009 |
4.6 / 5 (8) |
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(PhysOrg.com) -- Cornell researchers and colleagues have created cell phones that allow deaf people to communicate in sign language, the same way hearing people use phones to talk.
iPhones are musical instruments in new course and ensemble (w/ Video)
Dec 01, 2009 |
3.4 / 5 (10) |
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(PhysOrg.com) -- iPhones are being used as musical instruments in a new course at the University of Michigan.
IBM Reveals Five Innovations that Will Change Cities in the Next Five Years (w/ Video)
Dec 17, 2009 |
3.4 / 5 (9) |
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Today, IBM unveiled a list of innovations that have the potential to change how people live, work and play in cities around the globe over the next five to ten years.
AT&T to release cellphone with optional projector
Electronics / Consumer & Gadgets
Dec 01, 2009 |
4.4 / 5 (7) |
1
If cellphones with built-in video projectors are going to take the country by storm, then Dallas will be at the eye of the hurricane.
Taiwan unveils super-tiny microchip
Dec 16, 2009 |
4.3 / 5 (6) |
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Taiwan has developed tiny microchips that could lead to lighter and cheaper laptops or mobile phones, researchers and observers said Wednesday.
GPS cell phone apps challenge standalone devices
Electronics / Consumer & Gadgets
Nov 28, 2009 |
3.6 / 5 (5) |
3
(AP) -- The growth of cell phones with global-positioning technology is making life uncertain for the makers of personal navigational devices that help drivers figure out where they are and where to go.
Google phone revolution or misdirection?
Dec 19, 2009 |
3.8 / 5 (4) |
1
Google smartphones are either a daring foray into the telecom world or a misunderstood test of the next-generation of the Internet giant's Android mobile operating system.
Apple countersues Nokia over phone patents
Dec 11, 2009 |
2 / 5 (5) |
2
(AP) -- Apple Inc. is suing cell phone maker Nokia Corp. for patent infringement, a countermove to Nokia's earlier suit against technologies used in Apple's iPhone.
Neuroscience in the driving seat
Medicine & Health / Neuroscience
Dec 11, 2009 |
5 / 5 (2) |
0
It emerged today that more drivers are using hand-held mobile phones than two years ago, despite the introduction of tougher penalties. The Transport Research Laboratory is worried because phone-using drivers ...
Google search getting eyes and ears
Dec 08, 2009 |
5 / 5 (2) |
0
Google search is getting eyes and ears, moving beyond typed key words to let people scour the Internet with mobile telephone cameras or spoken words in multiple languages.
Gadgets: Great gadgets, as a gift or not
Electronics / Consumer & Gadgets
Dec 17, 2009 |
3 / 5 (3) |
0
Officially this is not another gift guide. Instead I'd rather consider it the first of two roundups either of products I just haven't gotten to this year or some I have just couldn't find a home for.
New study finds gender divide in children's use of cell phone features (w/ Video)
Other Sciences / Social Sciences
Dec 17, 2009 |
3 / 5 (3) |
0
It's a given that many children will ask their parents for cell phones this Christmas. Now, a recent study by University of Alabama at Birmingham (UAB) sociologist Shelia Cotten, Ph.D., finds that the way the kids will use ...
Texting, tweeting ought to be viewed as GR8 teaching tools, scholar says
Dec 10, 2009 |
4 / 5 (2) |
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The impact of text messaging on the decline of formal writing among teens has been debated in pedagogical circles ever since cell-phone ownership became an adolescent rite of passage in the mid-2000s. But ...
Nokia sues top LCD, CRT display makers
Dec 01, 2009 |
5 / 5 (1) |
0
(AP) -- Nokia Corp., the world's biggest mobile phone maker, said Tuesday it has filed suits against several leading liquid crystal display makers - including Philips, Toshiba, Sharp and Samsung - for alleged price fixing.
