Computer Sciences
AI is a powerful tool for studying the human genome. But its recent popularity has inundated the field with innovation. With so many options, it's hard to know which AI algorithms work best. Cold Spring Harbor Laboratory ...
Dec 5, 2022
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52
Consumer & Gadgets
As meetings shifted online during the COVID-19 lockdown, many people found that chattering roommates, garbage trucks and other loud sounds disrupted important conversations.
Jul 11, 2022
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179
Engineering
A team of researchers at Stanford University, working with a colleague at the Chinese Academy of Sciences, has built an AI-based filtration system to remove noise from seismic sensor data in urban areas. In their paper published ...
Security
Surveillance cameras have an identity problem, fueled by an inherent tension between utility and privacy. As these powerful little devices have cropped up seemingly everywhere, the use of machine learning tools has automated ...
Mar 28, 2022
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211
Computer Sciences
Hearing loss is a rapidly growing area of scientific research as the number of baby boomers dealing with hearing loss continues to increase as they age.
Mar 1, 2022
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84
Telecom
Researchers at Chalmers University of Technology, Sweden, present a unique optical amplifier that is expected to revolutionize both space and fiber communication. The new amplifier offers high performance, is compact enough ...
Sep 21, 2021
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182
Hardware
Every piece of data that travels over the internet—from paragraphs in an email to 3D graphics in a virtual reality environment—can be altered by the noise it encounters along the way, such as electromagnetic interference ...
Sep 9, 2021
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214
Engineering
Having a home near a busy airport certainly has its perks. It is close to many establishments and alleviates the problem of wading through endless traffic to catch flights. But it does come at a cost—tolerating the jarring ...
Jul 13, 2021
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225
Electronics & Semiconductors
As society moves towards a renewable energy future, it's crucial that solar panels convert light into electricity as efficiently as possible. Some state-of-the-art solar cells are close to the theoretical maximum of efficiency—and ...
Jul 7, 2021
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344
Consumer & Gadgets
Fresh off its recent augmented reality (AR) kick, Facebook Labs has revealed plans to curate this AI software for wearable devices. Projected as a shorter-term goal than the previously announced AR glasses, this wrist-based ...
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
