What is the Meaning & Definition of ultrasound

The ultrasound is the term that refers to the sound wave that has a frequency that is above the audible spectrum by the ear of the man; the sound is located on the 20,000 Hz. Is really varied and important use which in today's society given to ultrasound, for example, in the industry, thanks to it may be measuring distances or develop nondestructive testing; In addition, medicine makes special use of it in many of their specialties.
The ultrasound is the most popular procedure in medicine that makes use of ultrasound. The issuance of this particular sound in the direction of a body made an image to form a purpose of diagnosis. Through a device called transducer, is emit waves of ultrasound to mass that is under study and the result will be the issuance of an echo, then a computer, deals with translating the mentioned echo into an image that can be displayed on a screen.
To reason that does not employ any type of radiation, ultrasound is popularly used to view and track the fetus in gestation since the womb. The application of a special area to study gel facilitates the transmission of ultrasound.
Another recurrent use given to the ultrasound is to repel insects. Sound wave of the ultrasound tends to disturb the insects and then, they are kept away.
Note that some animals such as bats and dolphins, make use of ultrasound as if it were a radar to be able to orient themselves (echolocation); waves that transmit these animals turn out to be so high that they are capable of rebounding in almost all of the objects that are to your around, therefore, create an image and so that they are oriented in the place in which they are found.