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harmonic ratio

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  • Harmonic conjugate — For geometric conjugate points, see Projective harmonic conjugates. In mathematics, a function defined on some open domain is said to have as a conjugate a function if and only if they are respectively real and imaginary part of a holomorphic… …   Wikipedia

  • Harmonic seventh — Inverse Septimal major second Name Other names Septimal minor seventh, Subminor seventh Abbreviation m7 Size Semitones …   Wikipedia

  • Harmonic series (music) — Harmonic series of a string. Pitched musical instruments are often based on an approximate harmonic oscillator such as a string or a column of air, which oscillates at numerous frequencies simultaneously. At these resonant frequencies, waves… …   Wikipedia

  • Harmonic oscillator — This article is about the harmonic oscillator in classical mechanics. For its uses in quantum mechanics, see quantum harmonic oscillator. Classical mechanics …   Wikipedia

  • Harmonic drive — A harmonic drive is an input/output gearing mechanism. It is typically used for gearing reduction, but may also be used to increase rotational speed or for differential gearing. Very high gear reduction ratios are possible in a small volume… …   Wikipedia

  • Harmonic series (mathematics) — In mathematics, the harmonic series is the divergent infinite series: Its name derives from the concept of overtones, or harmonics in music: the wavelengths of the overtones of a vibrating string are 1/2, 1/3, 1/4, etc., of the string s… …   Wikipedia

  • Harmonic division — In geometry, harmonic division of a line segment AB means identifying two points C and D such that AB is divided internally and externally in the same ratio:frac{CA}{CB} = frac{DA}{DB}.In the example shown below, the ratio is two. Specifically,… …   Wikipedia

  • Harmonic Drive — ▪ machine component       mechanical speed changing device, invented in the 1950s, that operates on a different principle from, and has capabilities beyond the scope of, conventional speed changers. It consists of a thin ring that deflects… …   Universalium

  • Harmonic mean — In mathematics, the harmonic mean (formerly sometimes called the subcontrary mean) is one of several kinds of average. Typically, it is appropriate for situations when the average of rates is desired.The harmonic mean H of the positive real… …   Wikipedia

  • Harmonic — This article is about the components of periodic signals. For other uses, see Harmonic (disambiguation). The nodes of a vibrating string are harmonics. A harmonic of a wave is a component frequency of the signal that is an integer multiple of the …   Wikipedia

  • harmonic construction — ▪ mathematics  in projective geometry, determination of a pair of points C and D that divides a line segment AB harmonically (see Figure >), that is, internally and externally in the same ratio, the internal ratio CA/CB being equal to the… …   Universalium

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