Related articles
Edit |
Discuss Article
1/f noise
1/f noise is a signal or process with a frequency spectrum such that the spectral energy density is proportional to the reciprocal of the frequency. 1/f noise, sometimes pronounced as one over f noise, is also called pink noise or flicker noise.
In particular, there is equal energy in all octaves. In terms of power at a constant bandwidth, 1/f noise falls off at -3dB per octave.
1/f noise is found in a wide variety of physical phenomena. Examples include electronic devices, financial markets, astronomy, and human coordination.
The human auditory system, which uses a roughly logarithmic concept of frequency approximated by the Bark scale, perceives equal magnitude at all frequencies.
Graphic equalizers also divide signals into bands logarithmically and report power by octaves; audio engineers put pink noise through a system to test whether it has a flat frequency response in the useful spectrum.
See also
External links
Source | Copyright
|
 |
 |
|
Webmasters: Add your website here:
Readers: Edit |
Discuss Listings
Noisefree America
NFA's monthly "Dirty Dozen" awards spotlight worst noise polluters.
http://www.noisefree.org
Noise Pollution Clearinghouse
An information resource with online database. Campaigns on specific noise issues and distributes "Quiet Zone" newsletter. Offers CD demonstrating worst noise offenders. Often quoted by major media.
http://www.nonoise.org/
Right to Quiet
Vancouver, BC, nonprofit society working to raise awareness of the value, benefits, and difficulties in obtaining quiet.
http://www.quiet.org/
Noise and Traffic Solutions
Netherlands site covering European Union committee to reduce noise pollution and other links.
http://www.xs4all.nl/~rigolett/ENGELS/
UK - Noise Act of 1996
Full text of the UK Noise Act of 1996.
http://www.hmso.gov.uk/acts/acts1996/1996037.htm
European Commission Green Paper on Future Noise Policy
European Commission paper on noise reduction policies.
http://europa.eu.int/en/record/green/gp9611/noise.htm
League for the Hard of Hearing
Nonprofit aimed at providing a network for consciousness raising and reducing noise. Contains information on airport noise, legislation, fact sheets, how to get involved, and hazards to avoid. Located in New York and Florida, United States.
http://www.lhh.org/noise/
Landscapers Involved with Neighborhoods and Kids (LINK)
Aims to reduce leaf blower noise by networking with others. Includes news release template and contact details.
http://www.concentric.net/~Wrigfam
The Noiseways Project
Noiseways is a virtual tour of New York City that demonstrates how noise pollution degrades the quality of nationally-known recreational sites and "greenways" used by bicycle and pedestrian commuters.
http://www.noiseways.org
Ban the Cannons
British Columbia group wants ban on propane cannons and other noise polluting bird scare devices in the Fraser Valley.
http://bancannons.tripod.com/
Farm Noise and Hearing Project
South Australian network of farmers and health professionals promoting hearing conservation in rural communities.
http://www.farmnoise.on.net/
Scarsdale Anti-Noise Patrol
Campaign to enforce Scarsdale's summer ban of gas-powered leaf blowers, with noise pollution links, photo galleries, and hearing protection recommendations.
http://www.geocities.com/scarsdale_noise/
Honku: Haiku about Traffic Noise
An international movement grown from one man's therapeutic exercise to alleviate the pain and suffering caused by too many honking vehicles outside his apartment window in Brooklyn
http://www.honku.org
Quiet Use Coalition
Quiet use of wilderness areas is presented as a normal use and argues against enabling gas engine, motorized machines in the quiet, national forests in U.S.
http://www.quietuse.org
Silent Majority: Citizens against car alarms
Website for a new campaign to ban car alarms from New York City.
http://www.silentmajorityny.org
Lower the Boom!
Anti-boomcar information.
http://www.lowertheboom.org
Rutgers Noise Technical Assistance Center
Providing training in sound level measurement for enforcement of municipal noise codes, the center has been providing assistance for over 35 years
http://www.envsci.rutgers.edu/org/rntac/index.html
Michael Wright's Noise Pollution Website
A rich resource of information, especially on boom cars, offering numerous examples of the contemptuous disregard some boom car operators have for their victims.
http://members.aol.com/mpwright9/noise1.html
World Forum for Acoustic Ecology
Includes background information, membership details, related resources, and information about how to sign up for their Listserv mailing list.
http://interact.uoregon.edu/MediaLit/WFAE/home/index.html
Marketplace - Loud Movies
CBC news program investigates sound levels in popular movies. Includes detailed analysis of several recent movies. [Requires Adobe Acrobat Reader for some items]
http://www.cbc.ca/consumers/market/files/health/loud_movies/
Noise Net - Noise and Vibration Information in the UK
Mainly a business directory, but also a source of good information.
http://www.noisenet.org
United Kingdom Noise Association (UKNA)
A unique coalition of key organisations lobbying on various aspects of noise.
http://www.superscript.co.uk/ukna/
Chronic Noise Pollution
Advice from Gilroy, California. Includes list of links covering major issues.
http://www.lighthousewoods.com/noise_pollution.html
Stress and Noise
Franklin Institute Report
http://www.fi.edu/brain/stress.htm#stressnoise
Citizens Against Noise
Los Angeles
http://www.neighborhoodlink.com/org/nonoise
Hush the Bus Movement
A group of Hong Kong residents fed up with noise pollution from televisions pumping out noise and ads on commuter buses.
http://www.hush-the-bus.com/
|
