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This page is about audible acoustic waves. For other uses see Sound (disambiguation) or Soundwave

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Wikipedia About Sound

This page is about audible acoustic waves. For other uses see Sound (disambiguation) or Soundwave

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Sound is a travelling wave which is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.

Perception of sound

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For humans, hearing is normally limited to frequencies between about 12 Hz and 20,000 Hz (20 kHz), although these limits are not definite. The upper limit generally decreases with age. Other species have a different range of hearing. For example, dogs can perceive vibrations higher than 20 kHz. As a signal perceived by one of the major senses, sound is used by many species for detecting danger, navigation, predation, and communication. Earth's atmosphere, water, and virtually any physical phenomenon, such as fire, rain, wind, surf, or earthquake, produces (and is characterized by) its unique sounds. Many species, such as frogs, birds, marine and terrestrial mammals, have also developed special organs to produce sound. In some species, these have evolved to produce song and speech. Furthermore, humans have developed culture and technology (such as music, telephone and radio) that allows them to generate, record, transmit, and broadcast sound.

Physics of sound

The mechanical vibrations that can be interpreted as sound are able to travel through all forms of matter: gases, liquids, solids, and plasmas. The matter that supports the sound is called the medium. Sound cannot travel through vacuum.

Longitudinal and transverse waves

Sound is transmitted through gases, plasma, and liquids as longitudinal waves, also called compression waves. Through solids, however, it can be transmitted as both longitudinal and transverse waves. Longitudinal sound waves are waves of alternating pressure deviations from the equilibrium pressure, causing local regions of compression and rarefaction, while transverse waves in solids, are waves of alternating shear stress.

Matter in the medium is periodically displaced by a sound wave, and thus oscillates. The energy carried by the sound wave converts back and forth between the potential energy of the extra compression (in case of longitudinal waves) or lateral displacement strain (in case of transverse waves) of the matter and the kinetic energy of the oscillations of the medium.

Sound wave properties and characteristics

Sound waves are characterized by the generic properties of waves, which are frequency, wavelength, period, amplitude, intensity, speed, and direction (sometimes speed and direction are combined as a velocity vector, or wavelength and direction are combined as a wave vector).

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News about Sound

Puget Sound Energy seeking gas-rate decrease

Bellevue ReporterBellevue-based Puget Sound Energy wants to reduce the amount customers pay for natural gas. The utility is asking the Washington State Utilities and Transportation to decrease the rate an overall 12.5 percent.http://www.pnwlocalnews.com/east_king/bel/news/44642247.html

Puget Sound Energy request gas rate decrease

Seattle TimesPuget Sound Energy is asking Washington utility officials to approve an overall 12.5 percent gas-rate decrease for its customers.http://seattletimes.nwsource.com/html/localnews/2009199556_w...

SOUTH SOUND: PSE files for increase in gas, electric rates

The OlympianPuget Sound Energy filed a general rate case Friday with the Washington Utilities and Transportation Commission that could lead to an overall 2.2 percent increase in natural gas rates and a 7.4 percent boost in electric rates in April.http://theolympian.com/southsound/story/845541.html

Rockwood Sound applies for John Lewis grant

icWalesSELF-FUNDED hospital radio station Rookwood Sound provides entertainment and escapism for staff, patients and their families at Rookwood and Llandough Hospitals.http://www.walesonline.co.uk/news/wales-news/2009/05/09/rock...

Praed Will Join Fisher in U.K. Tour of Sound of Music

PlaybillConnie Fisher, who originated the role of Maria in the 2006 London Palladium revival of Rodgers and Hammerstein's The Sound of Music, will return to that part for a new U.K national tour, which will also feature Michael Praed as Captain von Trapp.http://www.playbill.com/news/article/128837-Praed+Will+Join+...

News about Sound

Jarvis Cocker won't bring back Pulp

Boston GlobeHe added: "I will go and see Blur at Hyde Park because I'm genuinely interested to see what they sound like."http://www.boston.com/ae/celebrity/articles/2009/05/10/jarvi...

Amy Winehouse cuts short comeback gig in Caribbean

Guardian UnlimitedHe says heavy rain pounded the stage on the Caribbean island, causing a lighting rig to fail and disrupting sound equipment. The gig was the troubled British singer's first performance of 2009. Goodman says that Winehouse attempted to continue her ... http://www.guardian.co.uk/world/feedarticle/8499522

Teaching Americans to Read and Write

ABC NewsThe government report, which was released Wednesday, looks at specific skills such as oral fluency (the ability to read out loud quickly and accurately) and decoding (the ability to break apart unfamiliar words and sound them out). It presents new ... http://abcnews.go.com/US/story?id=7540808&page=1

Best bets: ‘Angels & Demons’ takes flight

MSNBC ... to release his first album in 3 years, “Crime Pays.” After an early listen, XXL magazine’s Dallas Penn wrote, “The new CD hasn’t given me the same energy I had come to expect from Cam. It’s a bit more measured and that makes it sound ... http://www.msnbc.msn.com/id/29728584/

High winds blow roof off Vt. building

Boston GlobeSeveral Washington residents reported seeing a funnel cloud. Hunter Shaw says it came over a hill to the west and headed toward the village, rotating and making a loud grinding sound.http://www.boston.com/news/local/vermont/articles/2009/05/10...

Search results for Sound

sound definition of sound in the Free Online Encyclopedia.

sound, any disturbance that travels through an elastic medium such as air, ground, or water to be heard by the human ear. When a body vibrates, or moves back and forth (see ... http://encyclopedia2.thefreedictionary.com/sound

Download Sound Effects | SoundDogs.com

Sounddogs is the premiere online source for sound effects, production music, sound clips, free sound effects samples and loops.http://www.sounddogs.com/

sound - definition of sound by the Free Online Dictionary, Thesaurus ...

sound 1 (sound) n. 1. a. Vibrations transmitted through an elastic solid or a liquid or gas, with frequencies in the approximate range of 20 to 20,000 hertz, capable of being ... http://www.thefreedictionary.com/sound

Sound Title page

The Science of Sound How is sound made? Sound Lessons Experiments our students tried. Uses for Sound Who uses sound? Music To Our Ears How do we hear sounds?http://www.fi.edu/fellows/fellow2/apr99/soundindex.html

sound definition | Dictionary.com

Copy & paste this link to your blog or website to reference this pagehttp://dictionary.reference.com/browse/sound

Wikipedia results for Sound

Sound - Wikipedia, the free encyclopedia

Sound is a travelling wave which is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level ... http://en.wikipedia.org/wiki/Sound

Sound (geography) - Wikipedia, the free encyclopedia

In geography a sound or seaway is a large sea or ocean inlet larger than a bay, deeper than a bight, wider than a fjord, or it may identify a narrow sea or ocean channel between ... http://en.wikipedia.org/wiki/Sound_%28geography%29

Sound film - Wikipedia, the free encyclopedia

A sound film is a motion picture with synchronized sound, or sound technologically coupled to image, as opposed to a silent film. The first known public exhibition of projected ... http://en.wikipedia.org/wiki/Synchronized_sound

Sound design - Wikipedia, the free encyclopedia

Sound design is a conceptually creative/technical field. It covers all non-compositional elements of a film, a play, a music performance or recording, computer game software or any ... http://en.wikipedia.org/wiki/Theatre_sound

Sound recording and reproduction - Wikipedia, the free encyclopedia

Sound recording and reproduction is a electrical or mechanical inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects.http://en.wikipedia.org/wiki/Sound_recording
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IMVU - Who Will You Be? - No Sound

IMVU - Who Will You Be? - No SoundThis is the "no audio" version of the IMVU video - Who Will You Be?Flash - Video

Volunteer N.J. EMTs Sound Alarm Ove...

Volunteer N.J. EMTs Sound Alarm Over SafetyN.J. Gov. Corzine wants to use some of the money allocated to pay for the training of volunteer EMTs to help balance the budget. Well, the EMTs don't like that idea so they...Windows Media - Video

"Star Trek" Stars Sound Off

Director JJ Abrams talks about taking on the sci-fi classic while the cast spills on special effects, diehard fans and more.Flash - Video

Organic mango festival

Organic mango festivalTo popularise organic food a week long mango festival in India's southern Kochi is showcasing more than 150 rare varieties of mangoes.Flash - Video

BGT FINAL -Paul Potts high quality ...

BGT FINAL -Paul Potts high quality video/soundPaul Potts' debut CD "One Chance" is now available, in stores in the US, Europe and around the world or on line. Paul's official websites are:...Flash - Video

Answers for Sound

Recsound?????RecAir is generally characterized by its density, because different volumes of air have different masses, while retaining identical properties. If air molecules started weighing more for some inexplic...moore_mickiWhy would surround sound play certain dvds and not play the sound a certain series of others?moore_mickiThe DVD's surround sound encoding may not be compatible with the decoder in your receiver. As for the satellite, that is because it is in stereo, not in 5.1, 5.2, 7.1, 7.2, etc. The TV speakers don't ...SppeedRacerWhat sound patch is used to make that RAVE music sound?SppeedRacerwell, it depends on what type of synth you have. the roland jupiter, I think it is, has a patch on it called the hoover which is very commonly used in raves. it can be used for basslines, or as a lead...bigalexeHow can i fix sound lag in a home theater system?bigalexeThis is pretty typical. The best thing to do is turn off the TV sound and just enjoy the sound from your surround system.RevKevWhat drivers should be installed to make a sound card work?RevKevis there any error on those bunch of items? if there is none then try to check volume control. if there is then you might have installed the wrong driver. normally just a driver is enough for the soun...
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