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noise
Last modified: Thursday, August 24, 2006 

(1) In communications, interference (static) that destroys the integrity of signals on a line. Noise can come from a variety of sources, including radio waves, nearby electrical wires, lightning, and bad connections. One of the major advantages of fiber optic cables over metal cables is that they are much less susceptible to noise.

(2) In general, anything that prevents a clear signal or message from being transmitted. For example, you might hear someone complain of a lot of noise in a newsgroup, meaning that there are many superfluous messages that don't add anything to the discussion.

(3) In digital images and digital photography the term noise is used to describe the occurrence of color dots or specks where there should be none. For example, in a digital image of a pool of blue water, you may notice white, grey or other colored specks in the image where it should be blue. In scanning technology, image noise is usually referred to as grain or film grain.

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Noise Meters - Industrial product directory allows users to send RFQs, view catalogs and compare suppliers. Find suppliers of Meters.

Noise and Vibration Control - Supplies shock and vibration test equipment including electro-dynamic shakers, package testers, fixtures and vibration control systems

Safetytec Corp - Machinery Safety Consultants. CE Marking. Safety Guards and products. Plant safety manuals, etc. Safety Training and courses.


For internet.com pages about noise . Also check out the following links!

Related Links

Neat Image 
Neat Image is a filter designed to reduce visible noise and grain in photographic images produced by digital cameras and scanners. Neat Image is indispensable in low-light (indoors, night, astro) and high-speed (sport, action) photography. It is a tool for both professional photographers and digital image processing enthusiasts.

Webopedia's Quick Reference: The Digital Camera Picture 
If you can't keep up with advances in digital camera, you're not alone. We help you make sense of megapixels, zero in on the zooms (digital, optical and total) and delve into everything from price points to paper to printers.

Comparison of power protection methods
Compares the level of protection offered by different types of devices, such as UPS's, line conditioners, and surge suppressors. This page is from "The PC Guide".

External power problems
Describes common electrical problems, such as line noise, surges, and brownouts. This page is part of "The PC Guide".

Protection against power problems
Describes devices, such as surge suppressors and line conditioners, that can help with electrical problems. This page is part of "The PC Guide".

Sponsored listings

GlobalSpec.com: Acoustic Panels - Provides database of suppliers for Acoustic Panels. Browse catalogs and view technical information.

GlobalSpec.com: Noise & Vibration Control - Database of suppliers for noise and vibration control equipment. Provides catalogs, technical information and supplier contact information.

Professional Measurement: noise meter - The best in light meter, sound meter, anemometer and various other test & measurement product technology, innovation, quality and value since 1982.

Vibration Control Product Distributors: ArtUSA Industries - Designs and manufactures noise control systems, sound enclosures and air filtration systems.

MicroMo Electronics: Direct Current (DC) Electric Motors - Specializes in the design, assembly and application of high precision, miniature DC drive systems, components, and motion control systems.

related categories

Communications

Graphics

related terms

communications

crosstalk

digital camera

digital photography

fiber optics

graphics file formats

image

SNR

solar fade


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