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.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with phone
GSM system about to be compromised
Dec 08, 2009 |
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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 ...
AT&T to release cellphone with optional projector
Electronics / Consumer & Gadgets
Dec 01, 2009 |
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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.
Google phone revolution or misdirection?
Dec 19, 2009 |
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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.
IBM Reveals Five Innovations that Will Change Cities in the Next Five Years (w/ Video)
Dec 17, 2009 |
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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.
Google tests new phone to profit from mobile Web
Electronics / Consumer & Gadgets
Dec 14, 2009 |
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(AP) -- Google Inc. is determined to gain more influence over how the Web is used on mobile phones, even if the next step in the quest tramples some of the relationships forged during its two-year expansion ...
Neuroscience in the driving seat
Medicine & Health / Neuroscience
Dec 11, 2009 |
5 / 5 (2) |
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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 ...
Apple countersues Nokia over phone patents
Dec 11, 2009 |
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(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.
Google search getting eyes and ears
Dec 08, 2009 |
5 / 5 (2) |
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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.
Researchers create cell phones for sign language
Dec 02, 2009 |
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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 |
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(PhysOrg.com) -- iPhones are being used as musical instruments in a new course at the University of Michigan.
Cell phone mania forces scramble for more airwaves
Dec 27, 2009 |
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1
(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 |
1 / 5 (1) |
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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 ...
Attention Demands May Explain Why Texting While Driving Is So Dangerous
Medicine & Health / Psychology & Psychiatry
Dec 21, 2009 |
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(PhysOrg.com) -- A timely study in the journal Human Factors suggests why texting while driving is riskier than talking on a cell phone or with another passenger. Human factors/ergonomics researchers at the University of Uta ...
Maine to consider cell phone cancer warning
Dec 21, 2009 |
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(AP) -- A Maine legislator wants to make the state the first to require cell phones to carry warnings that they can cause brain cancer, although there is no consensus among scientists that they do and industry leaders dispute ...
Mobile tech 'can replace cheques'
Dec 18, 2009 |
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2
(PhysOrg.com) -- With cheques due to be phased out in the UK by 2018 new security technology developed at Oxford University could offer a replacement, allowing people a secure way to pay in almost any situation.
