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Electromagnetic waves
299 792 458 m/sec
Electric current (electric signal in copper)
Magnetism
Sound
340.29 m/sec
waves in Liquids/fluids
Freq
Heinrich Hertz
wavelength = speed of the wave / freq
Wavelength
Ultra sounds
Acoustic
Infra sounds
Ultra sound
2 MHz
20
60KHz
200 KHz
79KHz
20KHz
70 KHz
Frequency
1KHz-200KHz
40Hz-60KHz
1KHz-70KHz
55Hz-79KHz
http://www.lsu.edu/deafness/HearingRange.html
Superficial structures (muscles, tendons, testes, breast, thyroid and parathyroid glands, and the neonatal brain)
7-18 MHz
1-6 MHz
Deeper structures (liver, kidney)
Ultrasonic welding
SONAR
Ultrasonic cleaner
"The Incredible Hulk" movie clip