Consumer & Gadgets

Google says no India launch for radar-enabled Pixel 4 smartphone

Google will not launch its newest Pixel 4 smartphone in India, the company has said, disappointing consumers with a decision reportedly based on its refusal to disable a feature that uses a radar frequency barred in the South ...

Business

Huawei lashes out at Estonia for 'unfounded' security claims

Chinese telecom company Huawei on Tuesday criticized the Estonian government and media for spreading what it says are "arbitrary and unfounded" allegations about cybersecurity risks related to the company's mobile phones.

Engineering

Mobile phone signals provide occupancy numbers for buildings

Buildings currently consume about 40 percent of all the electricity used in the United States, most of them located in urban areas that are growing rapidly. Because electricity generation is the largest source of greenhouse ...

Energy & Green Tech

Li-ion batteries: Science 'directly into your hand'

They are omnipresent and essential to navigating modern life. Small, light, rechargeable: lithium ion batteries have revolutionised our world in less than three decades.

Engineering

Discoveries in sensor technology advance personalized medicine

Imagine a world where you could present your personal physician with a year's worth of not only your real time heart rate and activity levels but also dynamic glucose and insulin concentrations, cortisol, dopamine, serum ...

Software

Android 10 Go edition will bring speed, security gains

Google is bringing out its updated Android 10 version of Android Go. Google said, "we launched Android (Go edition) in 2018—a platform tailored for smartphones with 1.5GB of memory or less." Now Google has announced Android ...

page 1 from 19

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