ultrasonic wave


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ultrasonic wave

Etymology: L, ultra, beyond, sonus, sound
a sound wave transmitted at a frequency greater than 20,000 hz per second, or beyond the normal hearing range of humans. The specific wavelength is equal to the velocity divided by the frequency.

ultrasonic wave

A sound wave of greater frequency than 20 kHz. These waves do not produce sound audible to the human ear.
See also: wave
References in periodicals archive ?
As we know, the ultrasonic transducer is excited by the high frequency electrical pulse, and then the ultrasonic wave propagates in the detected medium.
Ultrasonic wave not only can degrade pollutants through oxidation and pyrolysis processes in soil, but also move the pollutant to the other sources such as water through soil washing which is much easier to decontaminate it [12- 15].
Modelling of the ultrasonic wave propagation in the waveguides was carried out using a finite element technique as well.
The propagation behaviour of high frequency stress wave is determined by the measurement of velocity and attenuation of ultrasonic waves, as a function of environmental variables such as temperature, pressure etc.
In this study, the soil flushing tests were conducted for two conditions, without ultrasonic waves and with ultrasonic waves at 20 kHz frequency.
A 40-mm diameter rod was connected to the directional converter of ultrasonic waves to focus the ultrasonic waves on the molding product.
1] stress, this is treated with ultrasonic waves, using a transductor able to generate ultrasonic waves with power of 150 W.
For transit time flowmeters, a transducer sends an ultrasonic wave across the flowing stream to the receiving transducer.
Without knowing the nuances of the ultrasonic wave propagation in the test object it is impossible to design effective inspection technique and search units for it realization.
For applications which require all measurements to be recorded, the measuring cell of the urea sensor contains two piezo ceramics, which both emit and detect ultrasonic wave signals.
It can also be dismounted without tooling, and cleaned via ultrasonic wave bath.
Also the ultrasonic wave emitters are beamed by the computer system, so that user feels the keyboard pressing against their skin, without anything being in their hand.

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