Internet

Google Maps displays traffic light locations

For millions of motorists around the globe, GPS traffic guidance has become indispensable. This week, Google confirmed it has been testing a feature that will make getting to where you want to go even easier: traffic light ...

Energy & Green Tech

Building a better battery, faster

Battery experts at PNNL and elsewhere focus on developing rechargeable lithium-metal batteries because of their high energy density. Lithium-metal batteries have the potential to double the energy of lithium-ion batteries ...

Consumer & Gadgets

Old phone to recycle? In France, just drop it in the mail

Figuring out what to do with an old mobile phone just got easier in France, where people can now send them free in the mail to have them recycled or refurbished for sale by a charity group.

Consumer & Gadgets

What to except from Samsung Unpacked 2020 event

Samsung is kicking off the 2020 phone season next Wednesday with what's expected to be a slew of new Galaxy Note models, an updated Fold phone, and several other products.

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Telephone

The 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 ✆.

This text uses material from Wikipedia, licensed under CC BY-SA