Computer Sciences
Artificial intelligence and machine learning are currently affecting our lives in many small but impactful ways. For example, AI and machine learning applications recommend entertainment we might enjoy through streaming services ...
Jan 21, 2022
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323
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 ...
Computer Sciences
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 ...
Electronics & Semiconductors
Random Telegraph Noise (RTN), a type of unwanted electronic noise, has long been a nuisance in electronic systems, causing fluctuations and errors in signal processing. However, a team of researchers from the Center for Integrated ...
Aug 10, 2023
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114
Hi Tech & Innovation
Hyundai has unveiled special noise cancellation technology addressing noise control.
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
1
179
Engineering
One obstacle to realizing the dream of flying cars is noise—imagine 1,000 leaf blowers intruding over your backyard barbecue.
Jan 31, 2022
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12
Engineering
It's no secret the U.S. Army wants its small unmanned aerial systems to operate quietly in densely-populated regions, but tests to achieve this can be expensive, time-consuming and labor-intensive according to researchers.
Dec 3, 2020
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6
Engineering
Reporting in the journal Scientific Reports, the team of Tong Xiao, Xiaojun Qiu and Benjamin Halkon highlight the positive impacts for health and wellbeing of their 'virtual Active Noise Control/Cancelation (ANC) headphone' ...
Nov 30, 2020
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25
Security
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, ...
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
