ultrasonic


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ultrasonic

of, concerned with, or producing waves with the same nature as sound waves but frequencies above audio frequencies
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

ultrasonic

[¦əl·trə′sän·ik]
(acoustics)
Pertaining to signals, equipment, or phenomena involving frequencies just above the range of human hearing, hence above about 20,000 hertz. Also known as supersonic (deprecated usage).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

ultrasonic

Ultrasonic refers to sound that is beyond the audible hearing range; typically above 20 kHz (20,000 Hz). In medicine, ultrasound machines emit ultrasonic waves that echo back an image of a fetus or internal organ. They are also used to administer therapy to various parts of the body. Contrast with infrasonic. See ultrasonic welding and saser.


Kardia Ultrasonic EKG Data Transfer
By placing fingers on this pad for 30 seconds, the body's electrical heart rhythm is converted to ultrasonic waves picked up by the Kardia app running in a smartphone nearby. The finger pad has no battery.
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References in periodicals archive ?
As we know, the ultrasonic wave is a kind of elastic waves propagating in the medium with higher frequency.
Raw materials were sawed into 21 by 21 by 5-mm samples, put into distilled water, and treated with ultrasonic parameters, as shown in Table 1.
The overall ultrasonic pulse velocity tester market worldwide is set to grow with a CAGR of 5.9% during the forecast period.
According to Aurand, ultrasonic food cutting systems are often used in the following applications:
EJ Electronics are one of the biggest service centres for ultrasonic cleaning systems and tanks.
In this work, we fabricated the miscible PC/PMMA blends by using the ultrasonic-assisted transesterification process and systematically investigated the effects of sonication time and ultrasonic power on the transesterification process.
It emits ultrasonic and electromagnetic waves at 20-55kHZ that protects up to 200 m2 radius.
The company built its first ultrasonic slitter for the hook and loop industry in the late 1970s.
The ultrasound-assisted extraction was performed on an ultrasonic homogenizer (JY92-II, Ningbo Scientz Biotechnology Co., Ltd., China).