The sounds are made by tiny piezoelectric crystals that vibrate in response to current sent from a microchip.
12.
Also, at Bell Labs during the 1960s, he was the co-discoverer of the photorefractive effect in the piezoelectric crystal
13.
In most piezoelectric motors, the piezoelectric crystal is excited by a sine wave signal at the resonant frequency of the motor.
14.
The emerging ink jet material deposition market also uses inkjet technologies, typically printheads using piezoelectric crystals, to deposit materials directly on substrates.
15.
He could not afford the voyage to US so he started a small production line for devices with piezoelectric crystals, mainly microphones.
16.
Turbines with diameters on the scale of 10 centimeters work by flexing piezoelectric crystals as they rotate, sufficient to power small electronic devices.
17.
The growth and forming of piezoelectric crystals is a well-developed industry, yielding very uniform and consistent distortion for a given applied potential difference.
18.
Piezoelectric crystals change size and shape when a voltage is applied; AC voltage makes them oscillate at the same frequency and produce ultrasonic sound.
19.
For the nonpolar but piezoelectric crystals, on the other hand, a polarization " "'P " "'different from zero is only elicited by applying a mechanical load.
20.
The Curies immediately confirmed the existence of the converse effect, and went on to obtain quantitative proof of the complete reversibility of electro-elasto-mechanical deformations in piezoelectric crystals.
