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resonating cavity

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resonating cavity [′rez·ən‚ād·iŋ ′kav·əd·ē]
(electromagnetism)
Short piece of waveguide of adjustable length, terminated at either or both ends by a metal piston, an iris diaphragm, or some other wave-reflecting device; it is used as a filter, as a means of coupling between guides of different diameters, and as impedance networks corresponding to those used in radio circuits.


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The tone of sound produced by these instruments can vary depending on the shape and resonating cavity construction of each instrument.
This eliminates the need for a resonating cavity and permits the cell size to be reduced to below the wavelength of the microwave radiation.
 
 
 
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