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Active noise control is the modification of an unwanted sound by using an electromechanical source to generate another interfering sound.
Contains sites dealing with education in acoustics
Employment in the field of acoustics.
Sites showing the use of acoustical principles in the past.
Contains links to Institutes and Universities working on the field of acoustics.
Sites about acoustic topics which are not suitable for inclusion in another acoustic category.
This category is for informational sites only. Business sites go here. Please submit only websites that have English language content to this category. If your site is in a language other than English, please submit it to the appropriate category of World.
Ultrasound is cyclic sound pressure with a frequency of 20 kilohertz or over, greater than the upper limit of human hearing.
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Last update: Sunday, February 9, 2014 12:54:10 PM EST - edit