Harmonic analysis

（重定向自Abstract harmonic analysis）

Bass guitar time signal of open string A note (55 Hz).

Fourier transform of bass guitar time signal of open string A note (55 Hz), computed with https://sourceforge.net/projects/amoreaccuratefouriertransform/ .

Analyseur harmonique mécanique de Lord Kelvin datant de 1878.

Harmonic analysis is a branch of mathematics concerned with the representation of functions or signals as the superposition of basic waves, and the study of and generalization of the notions of Fourier series and Fourier transforms (i.e. an extended form of Fourier analysis). In the past two centuries, it has become a vast subject with applications in areas as diverse as signal processing, quantum mechanics, tidal analysis and neuroscience.

单词	Abstract harmonic analysis
释义	Abstract harmonic analysis 英语百科 Harmonic analysis （重定向自Abstract harmonic analysis） Harmonic analysis is a branch of mathematics concerned with the representation of functions or signals as the superposition of basic waves, and the study of and generalization of the notions of Fourier series and Fourier transforms (i.e. an extended form of Fourier analysis). In the past two centuries, it has become a vast subject with applications in areas as diverse as signal processing, quantum mechanics, tidal analysis and neuroscience.
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