Discrete Fourier Spectrum Analysis
The DFT unilateral spectrum is calculated for the equivalent interval real numbers, and the frequency, amplitude, complex components and phase are checked.
Discrete Fourier Spectrum Analysis User manual
- Fill in the parameters or select the file according to the form, and check the unit and format first.
- Input the eight-point cosine sequence and the 8Hz sampling rate, and observe the amplitude of the 2Hz frequency point.
- Click the processing button to view the results, you can copy or download and save.
Calculation method and processing rules
Calculated according to the negative exponential discrete Fourier formula, you can choose a rectangular window or a periodic Hann window, and correct the amplitude according to the window weight.
scope of use
Up to 1024 points, no zeros, no reading audio; the amplitude spectrum is not the power spectral density, and the results are affected by sampling and spectrum leakage.
Will the input content be saved on the server?
This tool handles input in the browser, and does not upload files or form content. Typing practice scores are only saved in the native browser.
Why may the result be different from other tools?
Up to 1024 points, no zeros, no reading audio; the amplitude spectrum is not the power spectral density, and the results are affected by sampling and spectrum leakage. Please compare the input unit, rounding method, applicable rules and data version first.