Q. 64 A5.0( 7 Votes )
What is ultrasound? What is the difference between ordinary sound and ultrasound?
The sound wave with the frequency above 20,000 Hz. The ordinary sound wave has the frequency from 20 Hz to 20,000 Hz. Where as the ultrasound wave has the frequency above 20,000 Hz.
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What type of waves are generated by SONAR device fixed to a fishing ship?
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