Ultrasound waves are produced by the transducer. It is itself capable to generate and receive ultrasonic sound. It is made of an active element such as crystal material or piezoelectric. It helps to convert electric energy to an ultrasound wave. Flaw detector produces electric pulses; received by the transducer. Backing is a very dense material with high attenuative and used to control the radiation generated from the back face of the piezoelectric element. When the acoustic impedance is matching with backing material produce an excellent resolution. Ware plates are used to save the piezoelectric crystal from the environment.
So, the transducer can generate ultrasound and receive an echo of ultrasound. It is mainly producing a sound beam that passes through the body and returns by striking boundaries of the internal portion of the objectâ€™s body. These echoes generate the electric signal which sends to the scanner. Using the speed of sound and time of echoesâ€™ return the scanner calculates the distance from the transducer to the boundaries.
The transducer plays an important role in the ultrasound system. One of the functions that are played by the transducer is the production of ultrasound pulses, and another function of the transducer is to receive returning echoes. A piezoelectric element works as a vibrating object which helps is sound production. When the electric pulse is passed to a piezoelectric element, then a vibrating source attached to it starts to vibrate. When the vibrations occur at the tissue next to the transducer, then it passes vibrations to other adjacent tissues also. The continuation of this process takes place, and this causes the production of sound from a region of tissue to another region. The frequency of the sound is determined by the rate at which vibrations in the tissues takes place back and forth. The velocity of the sound can be defined as the rate at which these vibrations pass through the tissues.
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