Magpies under siege from climate and man-made noise
The combined impact of climate change and human-generated noise are proving double trouble for wild urban-dwelling bird species, changing their behavior in ways that could threaten their survival.
The combined impact of climate change and human-generated noise are proving double trouble for wild urban-dwelling bird species, changing their behavior in ways that could threaten their survival.
Plants & Animals
7 hours ago
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17
Scientists around the world work hard to rinse quantum systems for noise, which may disturb the function of tomorrow's powerful quantum computers. Researchers from the Niels Bohr Institute (NBI) have found a way to use noise ...
Quantum Physics
11 hours ago
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31
Researchers at the Department of Energy's Oak Ridge National Laboratory have demonstrated that advanced quantum-based cybersecurity can be realized in a deployed fiber link.
Optics & Photonics
Mar 13, 2024
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46
Many working dogs have to cope with sirens, sudden loud noises and flashing lights while carrying out vital work that keeps humans safe. Visual and acoustic distractions distinctly affect people's ability to concentrate and ...
Plants & Animals
Mar 13, 2024
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1
New research from the University of Aberdeen has shed light on what effect decommissioning could have on local marine mammals.
Plants & Animals
Mar 8, 2024
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4
Quantum sensor technology promises even more precise measurements of physical quantities. A team led by Christian Roos at the University of Innsbruck has now compared the signals of up to 91 quantum sensors with one another ...
Optics & Photonics
Mar 4, 2024
0
80
Improved neutron mirrors can increase the efficiency of material analysis in neutron sources such as the European Spallation Source. The improved mirror has been developed by researchers at Linköping University by coating ...
General Physics
Feb 29, 2024
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205
Using the Ankara University Kreiken Observatory (AUKR) in Turkey, astronomers have performed high-resolution spectroscopic observations of a metal-poor star known as HD 1936. Results of the observations campaign, published ...
In 1875, trillions of Rocky Mountain locusts gathered and began migrating across the western United States in search of food. The enormous swarm covered an area larger than California. Three decades later, these grasshoppers ...
Plants & Animals
Feb 13, 2024
0
6
Using data from the retired Stratospheric Observatory for Infrared Astronomy (SOFIA)—a joint project of NASA and the German Space Agency at DLR—Southwest Research Institute scientists have discovered, for the first time, ...
Astrobiology
Feb 12, 2024
1
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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