CATEGORIES Auto & Trucks Business & Finance Computers & Internet Education Family Food & Drink Gadgets and Gizmos Health Hobbies Home Improvement Humor Kids & Teens Legal Marketing Men Music and Movies Online Business Parenting Pets and Animals Politics and Government Recreation & Sports Relationships Religion and Faith Self Improvement Site Promotion Travel & Leisure Web Development Women Writing Keyword Search Article Title Author's Name SITE MENU Search Submit An Article Submit Articles in Bulk Submit Press Release Syndicate Articles Distribute Articles Privacy Policy Terms of Use Link To Us Contact Us Site Map Home

Characteristics Of Sound  by: Ryan Fyfe Sound in brief but remarkeable terms is a vibration, that our ears percieve by the sense of hearing. Most commonly vibrations travel to our ears via the air. The ear then converts these sound waves into nerve impulses that are sent to our brains, where the impulses become sound. To say all that in a more technical language: Sound "is an alternation in pressure, particle displacement, or particle velocity propagated in an elastic material" (Olson 1957). Sound is also a series of mechanical compressions and rarefactions or longitudinal waves that successively propagate through media that are at least a little compressible. What causes sound waves is known as "the source of waves". Examples of sounds sources is: A violin string that vibrates upon being bowed or plucked. The four characteristics of sound are frequency, wavelength, amplitude and velocity. The frequency of sound is the number of air pressure oscillations per second at a fixed point occupied by a sound wave. The amplitude is the magnitude of sound pressure change within the wave. Basically this is the maximum amount of pressure at any point in the sound wave. A sound wave is caused literally by increases in pressure at certain points causing a "domino effect" outward, the higher pressure points are the crests in a http://www.mysoundsite.com - sound wave, and behind them are low pressure points which tail them. These are known as the troughs on a wavelength graph. Sound's propagation Velocity depends largely on the type, temperature and pressure of the medium through which it propagates. Because air is nearly a perfect gas, the speed of sound does not depend on air pressure. The frequency range of sound that is audible to humans is approx. between 20 and 20,000 Hz. This range of course varies between individuals, and goes down as are age increases. Sounds will begin to damage our ears at 85 dBSPL and sounds above approximately 130 dBSPL will cause pain, as a result are known as the: "threshold of pain". Of course again this range will vary among individuals and will change with age. About The Author Ryan Fyfe is the owner and operator of My Sound Site - http://www.mysoundsite.com, which is the best site on the internet for all sound related information. Feel free to reprint this article as long as you keep the article, this caption and author biography in tact with all hyperlinks. This article was posted on November 07, 2005 Read More Articles from the "Education" Category: What is Continuing Education? by Manu Goel Orange County Schools Build Civic Education with Disney by Patricia Hawke Brick Fundraising Leaves a Moving, Lasting Legacy by Elaine Johnson This Summer is Full of Honors and Functions in the San Antonio School District by Stacy Andell How to Write a Resume for Your First Job by Laura Adams Speaking Japanese: Learning the Language and the Cultural Etiquette by Cory Pangelinan Online Education: Study At Your Own Pace! by Dana Goldberg San Francisco Schools’ Small Schools Program by Stacy Andell Six Sigma Jobs by Peter Peterka Enforcing School Safety In The UK by Paddy Swan << Back to "Education" Index

Disclaimer: The information presented and opinions expressed herein are those of the authors
and do not necessarily represent the views of ArticleCity.com and/or its partners.

	Web www.articlecity.com