Aviation: General

World Encyclopedia The Oxford Pocket Dictionary... The Columbia Encyclopedia,... Further reading

sound barrier

World Encyclopedia | 2005 | Copyright

sound barrier Name for the cause of an aircraft's difficulties in accelerating to a speed faster than that of sound. When approaching the speed of sound, an aircraft experiences a sudden increase in drag and loss of lift. These are caused by the build-up of sound waves to form shock waves at the front and back of the aircraft. The problems were solved by designing aircraft with smaller surface area, swept-back wings, and more powerful engines. See also sonic boom

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"sound barrier." World Encyclopedia. 2005. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

"sound barrier." World Encyclopedia. 2005. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O142-soundbarrier.html

"sound barrier." World Encyclopedia. 2005. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-soundbarrier.html

Learn more about citation styles

sound barrier

The Oxford Pocket Dictionary of Current English | 2009 | Copyright

sound bar·ri·er • n. (the sound barrier) the increased drag, reduced controllability, and other effects that occur when an aircraft approaches the speed of sound, formerly regarded as an obstacle to supersonic flight.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"sound barrier." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

"sound barrier." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O999-soundbarrier.html

"sound barrier." The Oxford Pocket Dictionary of Current English. 2009. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-soundbarrier.html

Learn more about citation styles

sound barrier

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

sound barrier see aerodynamics .

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"sound barrier." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

"sound barrier." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1E1-X-soundbar.html

"sound barrier." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-X-soundbar.html

Learn more about citation styles

Free newspaper and magazine articles

	A comparative study of wood highway sound barriers. (Management). Magazine article from: Forest Products Journal; 3/1/2002
	Design of wood highway sound barriers. (Reference Watch).(Brief Article) Magazine article from: Forest Products Journal; 4/1/2002
	Sound barrier uses PIR foam to cut noise.(us newslines)(Brief article) Magazine article from: Urethanes Technology International; 4/1/2009