Hi Tech & Innovation

A short first hop for 'drone taxi' in Vienna

It was more of a small step than a giant leap, but the first public outing of a pilotless "drone taxi" in Vienna on Thursday nevertheless offered a glimpse into the possible future of urban travel.

Robotics

Robotic bees are joining the International Space Station

"There are some things only humans can do in space. The rest can be left to robots." The NASA team is showcasing hw to put that simple observation into interesting practice with their development of Astrobees.

Computer Sciences

WaveGlow: A flow-based generative network to synthesize speech

A team of researchers at NVIDIA has recently developed WaveGlow, a flow-based network that can generate high-quality speech from melspectrograms, which are acoustic time-frequency representations of sound. Their method, outlined ...

Security

When smartphone finger taps can lead to side channel attack

You type, hacker deciphers, your password is doomed. That is the grim scenario being discussed in a paper that is now on arXiv. "Hearing your touch: A new acoustic side channel on smartphones," is by authors Ilia Shumailov, ...

Business

Google-linked firm wins US approval for drone deliveries

Wing Aviation, a firm owned by Google parent Alphabet, on Tuesday became the first drone operator to be certified as an airline by US authorities, allowing it to begin commercial deliveries in the country.

Computer Sciences

Research team explores model to fix noise in photos

Those meh photos that are too grainy can be given a new lease on digital life through a method worked up by researchers who found a way to cut the noise and artifacts. Noise in this context refers to visual distortion, as ...

Consumer & Gadgets

How Google's Pixel Buds earphones translate languages

In the Hitchhiker's Guide to The Galaxy, Douglas Adams's seminal 1978 BBC broadcast (then book, feature film and now cultural icon), one of the many technology predictions was the Babel Fish. This tiny yellow life-form, inserted ...

Engineering

NASA technologies significantly reduce aircraft noise

A series of NASA flight tests has successfully demonstrated technologies that achieve a significant reduction in the noise generated by aircraft and heard by communities near airports.

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Noise

In common use, the word noise means any unwanted sound. In both analog and digital electronics, noise is random unwanted perturbation to a wanted signal; it is called noise as a generalisation of the acoustic noise ("static") heard when listening to a weak radio transmission with significant electrical noise. Signal noise is heard as acoustic noise if the signal is converted into sound (e.g., played through a loudspeaker); it manifests as "snow" on a television or video image. High noise levels can block, distort, change or interfere with the meaning of a message in human, animal and electronic communication.

In signal processing or computing it can be considered random unwanted data without meaning; that is, data that is not being used to transmit a signal, but is simply produced as an unwanted by-product of other activities. "Signal-to-noise ratio" is sometimes used to refer to the ratio of useful to irrelevant information in an exchange.

In biology, noise can describe the variability of a measurement around the mean, for example transcriptional noise describes the variability in gene activity between cells in a population.

In many cases, the special case of thermal noise arises, which sets a fundamental lower limit to what can be measured or signaled and is related to basic physical processes described by thermodynamics, some of which are expressible by simple formulae.

In some fields, noise means unwanted information or data that is not relevant to the hypothesis or theory being investigated or tested.

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