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media that will act as an acoustic filter — i.e., transmit waves of certain
frequencies well, but fail entirely to pass waves of ... A frequency band such as /2/
3, in which the power-transmission ratio Attenua- is one, is called a pass band,
whereas a ...
To come to detailed examples, in the electromagnetic transducer, an alternating
current of the desired frequency is ... in such a source to ensure large output and
to diminish the distortion due to the resonant or normal mode frequencies of the ...
Such transitions can be either spontaneous or can be induced by the application
of appropriate external electric or magnetic fields at resonant frequencies.
Transitions also can occur in atoms, molecules, and ions between high-lying
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review