Question

ultrasonic My grandfather's dog is always pricking up its ears at some ultrasonic signal, while he himself is so deaf he can't even hear a bird singing. ˌəltrəˈsɑnɪk

Accepted Answer

Having a frequency higher than what can be heard by the human ear. Ultrasound, or ultrasonography, works on the principle that sound is reflected at different speeds by tissues or substances of different densities. Ultrasound technology has been used medically since the 1940s. Sonograms, the pictures produced by ultrasound, can reveal heart defects, tumors, and gallstones; since low-power ultrasonic waves don't present any risks to a body, they're most often used to display fetuses during pregnancy in order to make sure they're healthy. Ultrasonics has many other uses, including underwater sonar sensing. High-power ultrasonics are so intense that they're actually used for drilling and welding

word	ultrasonic
definition	Having a frequency higher than what can be heard by the human ear.
eg_sentence	My grandfather's dog is always pricking up its ears at some ultrasonic signal, while he himself is so deaf he can't even hear a bird singing.
explanation	Ultrasound, or ultrasonography, works on the principle that sound is reflected at different speeds by tissues or substances of different densities. Ultrasound technology has been used medically since the 1940s. Sonograms, the pictures produced by ultrasound, can reveal heart defects, tumors, and gallstones; since low-power ultrasonic waves don't present any risks to a body, they're most often used to display fetuses during pregnancy in order to make sure they're healthy. Ultrasonics has many other uses, including underwater sonar sensing. High-power ultrasonics are so intense that they're actually used for drilling and welding
IPA	ˌəltrəˈsɑnɪk

Ultrasonic Ultrasound Frequency Higher Heard Human Ear Grandfather's