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A thin-film bulk acoustic resonator (FBAR or TFBAR) is a device consisting of a piezoelectric material manufactured by thin film methods between two conductive – typically metallic – electrodes and acoustically isolated from the surrounding medium.
A resonator is a device or system that exhibits resonance or resonant behavior. That is, it naturally oscillates with greater amplitude at some frequencies, called resonant frequencies, than at other frequencies. The oscillations in a resonator can be either electromagnetic or mechanical (including acoustic). Resonators are used to either ...
A loop-gap resonator (LGR) is an electromagnetic resonator that operates in the radio and microwave frequency ranges. The simplest LGRs are made from a conducting tube with a narrow slit cut along its length.
A ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or more metal electrodes attached. When connected in an electronic oscillator circuit, resonant mechanical vibrations in the device generate an oscillating signal of a specific frequency .
An optical ring resonator is a set of waveguides in which at least one is a closed loop coupled to some sort of light input and output. (These can be, but are not limited to being, waveguides.) (These can be, but are not limited to being, waveguides.)
The resonator guitar was developed by John Dopyera, seeking to produce a guitar that would have sufficient volume to be heard alongside brass and reed instruments.In 1927, Dopyera and Beauchamp formed the National String Instrument Corporation to manufacture resonator guitars under the brand name National, adding resonator mandolins and ukuleles to their product line within the first year.
Giant GE hydrogen thyratron, used in pulsed radars, next to miniature 2D21 thyratron used to trigger relays in jukeboxes.Reference 2D21 tube is 2⅛ inches tall (54 mm).. A thyratron is a type of gas-filled tube used as a high-power electrical switch and controlled rectifier.
An electrolarynx, sometimes referred to as a "throat back", is a medical device used to produce clearer speech by those people who have lost their voice box, usually due to cancer of the larynx.