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
Spacesuits with artificial intelligence may look for life on Mars
Space & Earth / Space Exploration
Nov 04, 2009 |
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(PhysOrg.com) -- Astronauts may in future be wearing spacesuits equipped with artificial intelligence (AI) and digital eyes, turning them into what the researchers call cyborg astrobiologists.
New rechargeable zinc-air batteries coming soon
Oct 29, 2009 |
4.4 / 5 (45) |
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(PhysOrg.com) -- A new breed of rechargeable zinc-air batteries is soon to be available, and may replace lithium-ion batteries in cell phones, laptops and other consumer items. Lithium-ion batteries store ...
Verizon says Droid smart phone goes on sale Nov. 6
Electronics / Consumer & Gadgets
Oct 28, 2009 |
4 / 5 (5) |
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(AP) -- Verizon Wireless' answer to the iPhone - the Droid - will go on sale for $200 next week as the company taps into the growing appetite for smart phones that go far beyond making calls.
WHO study suggests link between cell phones and tumors
Oct 27, 2009 |
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(PhysOrg.com) -- Preliminary results of an International investigation by the World Health Organization (WHO) suggest there may be a "significantly increased risk" of some types of brain tumors after use of ...
Bias affects cell phone cancer risk findings
Oct 15, 2009 |
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(PhysOrg.com) -- A group of South Korean and American researchers has found studies of possible links between cell phones and brain tumors and other cancers vary in quality, and those suggesting there is little ...
Facebook Lite On its Way
Sep 15, 2009 |
3.8 / 5 (4) |
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(PhysOrg.com) -- The social networking site Facebook has begun testing a simpler, no-frills alternative to its regular interface. The cleaner, uncluttered interface is particularly aimed at entry-level users ...
Choosing a Low Radiation Cell Phone
Electronics / Consumer & Gadgets
Sep 10, 2009 |
4.4 / 5 (12) |
10
(PhysOrg.com) -- An Environmental Working Group (EWG) team has released a consumer guide on the radiation levels emitted by over 1,000 cell phones sold in the U.S. The guide is the most comprehensive ever ...
The Asus New Folding E-Book Reader
Electronics / Consumer & Gadgets
Sep 09, 2009 |
4.7 / 5 (14) |
9
(PhysOrg.com) -- Asus has demonstrated a prototype of an e-book reader it is developing. Unlike its competitors, the device resembles a normal book, having two touch screens that will fold up.
Nokia Showcases 3D Cell Phone
Electronics / Consumer & Gadgets
Sep 04, 2009 |
3.5 / 5 (4) |
0
(PhysOrg.com) -- Finnish giant Nokia, the world's biggest phone manufacturer, is developing a 3D mobile phone with a stereoscopic display. And you don't need 3D glasses to get the three-dimensional effect.
Doing More with Your Cell Phone
Electronics / Consumer & Gadgets
Aug 10, 2009 |
4.5 / 5 (2) |
4
(PhysOrg.com) -- As technology shrinks, and as it becomes possible to unplug and still conduct all of your business from a hand-held device, we demand more convenience. And there are two entities leading the ...
Plastics that convert light to electricity could have a big impact
Nanotechnology / Nanomaterials
Aug 04, 2009 |
4.6 / 5 (12) |
5
University of Washington researchers have found a way to measure exactly how much electrical current is carried by tiny bubbles and channels that form inside nanoscale solar cells, paving the way for development ...
Augmented Reality: Science Fiction or Reality? (w/ Video)
Jul 07, 2009 |
4.7 / 5 (17) |
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(PhysOrg.com) -- Computer graphics have come a long way since the birth of Atari Games over 30 years ago. Today, computer graphics seem very real and some day researchers will pull graphics out of your television ...
First Smartphone with 1GHZ Processor (w/ Video)
Electronics / Consumer & Gadgets
Jun 24, 2009 |
4.6 / 5 (5) |
3
(PhysOrg.com) -- Looks like the Apple iPhone 3G S may soon have some serious competition with the soon to be announced, Toshiba TG01 smartphone. The TG01 is expected to be officially announced at the Mobile ...
Scientists predict mobile phone viruses will pose a serious threat
Technology / Computer Sciences
May 21, 2009 |
5 / 5 (5) |
3
(PhysOrg.com) -- If you own a computer, chances are you have experienced the aftermath of a nasty virus at some point. In contrast, there have been no major outbreaks of mobile phone viral infection, despite ...
DIY 'tinkerers' create more than mere toys from spare parts
Apr 29, 2009 |
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To Ken Delahoussaye, an old computer, cell phone, camera or even a child's toy is much more than a disposable device. Each is something he can take apart and fuse with other parts to create something totally new.
