Using the ultrasound scanner, the ultrasonic waves travel through the tissues of the body and get reflected from a region where there is a change of tissue _____________.
Three different vibrating objects produce three types of sounds and . Sounds and cannot be heard by a man having normal range of hearing but sound can be heard easily. The sound is used in hospitals to break kidney stones of a patient into fine grains which then get flushed out with urine. The sound is similar to that which is produced during an earthquake before the main shock wave is generated. What type of sound is ?
