News tagged with noise
Frequency stabilization in nonlinear nanomechanical oscillators
Using Center for Nanoscale Materials (CNM) expertise in the design and fabrication of micro- and nanoscale devices, a new strategy for engineering low-frequency noise oscillators capitalizes on the intrinsic ...
May 28, 2012 |
5 / 5 (1) |
0
Quantum computer leap
(Phys.org) -- The main technical difficulty in building a quantum computer could soon be the thing that makes it possible to build one, according to new research from The Australian National University.
May 18, 2012 |
4.6 / 5 (14) |
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Research: Too much, too little noise turns off consumers, creativity
The sound of silence isn't so golden for consumers, and both marketers and advertisers should take note, says new research from a University of Illinois expert in new product development and marketing.
Other Sciences / Social Sciences
May 14, 2012 |
4.2 / 5 (6) |
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Researches quiet combustion with patented 'noise sponge'
(Phys.org) -- A sponge-like material employed by a University of Alabama engineering professor can significantly quiet combustion, possibly making work environments safer and extending the life of equipment.
May 01, 2012 |
5 / 5 (9) |
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Manatee hearing good enough to sense approaching motorboats
Every year, manatees are injured in boat collisions. Why don't they just move when they hear a boat approach? A team of scientists led by Joe Gaspard from Mote Marine Laboratory and Aquarium, USA, have found that manatee ...
Apr 12, 2012 |
5 / 5 (1) |
0
Fastest random number generator: Sounds of silence proving a hit
(Phys.org) -- Researchers at The Australian National University have developed the fastest random number generator in the world by listening to the 'sounds of silence'.
Apr 11, 2012 |
4.9 / 5 (10) |
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Canadians rally against wind power
Hundreds of Canadians demonstrated on Tuesday calling for an end to subsidies for wind power, saying noise from colossal turbines is making some people sick and driving down rural property prices.
Technology / Energy & Green Tech
Apr 03, 2012 |
2.4 / 5 (9) |
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3D planning tool for the city of tomorrow
Noise levels, fine particulate matter, traffic volumes – these data are of interest to urban planners and residents alike. A three-dimensional presentation will soon make it easier to handle them: as ...
Apr 02, 2012 |
5 / 5 (2) |
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Nanowires have superior electrical, mechanical properties and can be put to good use in pressure sensors
Miniaturized pressure sensors are widely used in mechanical and biomedical applications, for example, in gauging fuel pressure in cars or in monitoring blood pressure in patients. Woo-Tae Park and co-workers ...
Nanotechnology / Nanomaterials
Mar 29, 2012 |
5 / 5 (1) |
1
Not just for the birds: Man-made noise has ripple effects on plants, too
A growing body of research shows that birds and other animals change their behavior in response to manmade noise, such as the din of traffic or the hum of machinery. But human clamor doesn't just affect animals. ...
Mar 20, 2012 |
5 / 5 (4) |
4
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New chips, faster networks to improve phone audio
Smartphone owners can surf the Web, pay bills, watch videos, enjoy music and send email. But while their gadgets have been designed to handle increasing amounts of data, experts say, less attention has been paid to their ...
Mar 02, 2012 |
5 / 5 (4) |
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Blue whale behavior affected by man-made noise: study
Blue whale vocal behavior is affected by man-made noise, even when that noise does not overlap the frequencies the whales use for communication, according to new research published Feb. 29 in the open access journal PLoS ON ...
Feb 29, 2012 |
5 / 5 (1) |
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Locate and guide function for the human symbiotic robot 'EMIEW2'
Hitachi announced the addition of a new feature to the human symbiotic robot, EMIEW2, where when asked the location of an object, is now able to smoothly guide the enquirer to the location of the object after ...
Feb 28, 2012 |
5 / 5 (1) |
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Aircraft of the future could capture and re-use some of their own
Tomorrow's aircraft could contribute to their power needs by harnessing energy from the wheel rotation of their landing gear to generate electricity.
Technology / Energy & Green Tech
Feb 23, 2012 |
1.8 / 5 (6) |
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Birds sing louder amidst the noise and structures of the urban jungle
Sparrows, blackbirds and the great tit are all birds known to sing at a higher pitch (frequency) in urban environments. It was previously believed that these birds sang at higher frequencies in order to escape the lower frequencies ...
Feb 22, 2012 |
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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.
For more information about Noise, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
