US PATENT SUBCLASS 73 / 659
.~.~.~ Spectrum analysis

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

570  DF  VIBRATION {10}
649  DF  .~ Sensing apparatus {5}
658  DF  .~.~ With electrically controlled indicator {3}
659.~.~.~ Spectrum analysis

DEFINITION

Classification: 73/659

Spectrum analysis:

(under subclass 658) subject matter relating to the analysis of vibrations by measuring the amplitudes of the frequency components of the vibrations.

(1) Note. An example of a complete analysis would be the sensing and measuring of airplane vibrations over a wide range of engine speeds.