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In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. Only acoustic waves that have frequencies lying between about 20 Hz and 20 kHz, the audio frequency range, elicit an auditory percept in humans. In air at atmospheric pressure, these represent sound waves with wavelengths of 17 meters (56 ft) to 1.7 centimeters (0.67 in). Sound waves above 20 kHz are known as ultrasound and are not audible to humans. Sound waves below 20 Hz are known as infrasound. Different animal species have varying hearing ranges.

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Organizations relating to Sound

Latin American Federation of Societies of Ultrasound in Medicine and Biology / Est. 1983
Electroacoustic Music Studies Network / Paris, France
International Confederation for Electroacoustic Music / Chaintreaux, France / Est. 1982
International Bioacoustics Society / London, UK / Est. 1969
European Group of Endoscopy Ultrasonography / Est. 2003
European Society for Sonochemistry / Milan, Italy / Est. 1990
Musculoskeletal Ultrasound Society / Ann Arbor MI, USA
Alps-Adria Acoustics Association / Est. 2002
International Society of Acoustic Remote Sensing of the Atmosphere and Oceans / Vienna, Austria / Est. 1981
International Auto Sound Challenge Association / South Daytona FL, USA / Est. 1987
European Imaging and Sound Association / Lisbon, Portugal / Est. 1989
Adriatic Vascular Ultrasound Society / Florence, Italy / Est. 2004
Inter-Organization Programme for the Sound Management of Chemicals / Geneva, Switzerland / Est. 1995
World Insulation and Acoustics Congress Organization / Reston VA, USA
International Community for Auditory Display / Est. 1994
Institut international de l'image et du son / Elancourt, France / Est. 1988
Stop LFAS Worldwide / Santa Clara CA, USA
Imaging the World / Charlotte VT, USA
Society of Ultrasound in Medical Education / Columbia SC, USA
Picture and Sound World Organization / Est. 1964
Society of European Sonographers
Group of Acousticians of Latin America
International Society of Ultrasonic Surgery
International Institute of Sound / Est. 1950
Fédération européenne des industries techniques de l'image et du son / Paris, France / Est. 1958
World Federation of Sonographers
Mediterranean Association for Ultrasound in Obstetrics and Gynecology / Madrid, Spain / Est. 2002
International Society for Musculoskeletal Ultrasound / Est. 1990
World Acoustics Society
International Society of Ecoacoustics
Institut international de musique électroacoustique de Bourges / Bourges, France / Est. 1970
Ultrasonic Industry Association / Dayton OH, USA / Est. 1956
Audio and Loudspeaker Technologies International / Maricopa AZ, USA / Est. 1964
International Lung Sounds Association / Boston MA, USA / Est. 1976
International Veterinary Ultrasound Society / Manhattan KS, USA / Est. 2001
World Academy of Ultrasonic Piezoelectric Bone Surgery / Daegu, Korea Rep / Est. 2012
International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering
Nordic EUS Conference / Est. 2016
International Society of Intraoperative Cardiovascular Ultrasound / Est. 1989
Centre international pour la culture et l'instruction par l'image et le son / Brussels, Belgium
International Sound Foundation / Est. 1967
New International Community of Electroacoustic Music
ITS - Association of Imaging Technology and Sound / Vienna VA, USA / Est. 1986
International Society for Vibroacoustics / Est. 1985
CICV Pierre Schaeffer / Est. 1990
Intersonor - Société internationale d'enregistrements sonores
International Society of Transvaginal Sonography
Agence international de commercialisation et de promotion des produits des industries francophones d'enregistrement sonore
Association pour le développement de l'enseignement image et son / Est. 1966
Société internationale d'image et son / Arcueil, France

View all profiles (108 total) in the Yearbook of International Organizations

Action Strategies relating to Sound

From the Encyclopedia of World Problems and Human Potential

Providing artistic criticism
Grasping sounds inventory
Adopting sound grazing practices
Enhancing favourable trading environment
Using initiated sounds
Ensuring efficient and environmental sound urban transportation systems
Elder son
Establishing fundamental financial support
Learning sound finance systems
Developing acoustics
Establishing sound payment schedules
Developing sound recruitment for water resource agencies
Appreciating electroacoustic music
Identifying sustainable technology information gaps
Demonstrating sound environmental management
Improving urban transport
Using ultrasound
Transferring sound investment practices
Encouraging sound energy strategies

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