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ultra sounds are used for seeing a baby in an ultra sound
they change colors
Infra sonic, ultra sonic and sonic waves of sound Infra sonic has frequecy less than 20 Hz Ultra sonic has frequency more than 20,000 Hz Sonic waves having frequency range 20 - 20000 Hz
we can not hear ultra sonic sounds because u can not hear them
frequencies higher than 20 kHz are called ultra sound or ultra sonic sound.
no
sound waves with frequencies 20 hertz or lower are infrasonic and waves above 20,000hertz are ultra sonic!
Washing machine
They are called ultra sonic. They travel faster than sound
Ultra-
ultra sonic !!
Those are ultra sonic planes. There is a sonic boom if it is traveling with sound speed.