Harmonic Analyzer

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harmonic analyzer

[här′man·ik ′an·ə‚liz·ər]
An instrument that measures the strength of each harmonic in a complex wave. Also known as harmonic wave analyzer.

Harmonic Analyzer


a computational device for finding the harmonic amplitudes of complicated periodic functions. These analyzers are used in dynamic investigations of crank-and-connecting-rod mechanisms in engines, preliminary estimates of the effects caused by external periodic disturbances on oscillatory systems, analysis of acoustic vibrations, and the solution of similar problems. Practically all types of harmonic analyzers consist of an input device, multipliers, and integrators. The basic characteristics of harmonic analyzers (by which they are classified) are the type of function assigned (graph, electrical signal, or mechanical transposition), the highest harmonic number, and the number of coefficients computed simultaneously. The most common types are mechanical, which can simultaneously provide the amplitudes of 20 to 25 harmonics for a given function by manually following its curve.


Vasmanov, V. V. Vychislitel’nye matematicheskie pribory. Moscow, 1958.
Meier zur Kapellen, V. Instrumental’naia matematika dlia inzhenerov. Moscow, 1959. (Translated from German.)
References in periodicals archive ?
The Harmonic Analyzer adds cosines to create intricate patterns.
Michelson built his first prototype of a machine similar to the Harmonic Analyzer in 1897.
of Chicago manufactured two models of the Harmonic Analyzer.
Hammack said he found scattered references to the Harmonic Analyzer in popular science magazines, mostly from press releases that may have come from the University of Chicago, where Michelson taught physics.
The Harmonic Analyzer made a public appearance in an improved form at the 1933 World's Fair in the Great Hall of Science.