Ultrasonic sound
- Anything that is above the frequencies of audible sound (+20,000 Hz)
- The limit of human hearing is 20,000 Hz.
- Echolocation is an example of ultrasonic sound
- Ultrasound can be used to detect an unborn baby, for sonar, and dog whistles
http://www.acoustics.org/press/154th/aytekin.html
http://hyperphysics.phy-astr.gsu.edu/hbase/sound/usound.html
http://science.yourdictionary.com/articles/who-discovered-ultrasonic-sound.html
http://hyperphysics.phy-astr.gsu.edu/hbase/sound/usound.html
http://science.yourdictionary.com/articles/who-discovered-ultrasonic-sound.html
Trevor B