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Signaalitöötlus (DSP)5 min lugemistIEEE 754 DSP / W3C Web Audio

FFT Spectrum Analysis & Frequency Bin Resolution (Estonian)

Comprehensive guide on Fast Fourier Transforms, windowing algorithms (Blackman, Hann, Flat-top), sampling rates, and frequency bin resolution in audio analysis.

Δf = Sample Rate / FFT Size

Understanding FFT Spectrum Analysis & Frequency Bin Resolution

The Fast Fourier Transform (FFT) converts continuous time-domain audio samples into discrete frequency bins according to the W3C Web Audio API standards.

Frequency Bin Resolution Formula

Δf = Sample Rate / FFT Size

Windowing functions (Hann, Hamming, Blackman-Harris, Flat-Top) taper sample edges to minimize spectral leakage.

Audition in Visualizer Studio

Audition in Visualizer Studio

Test these acoustic concepts with live microphone or test tone signals. Visualizer Studio (Spectrum).

Open Spectrum Visualizer

Official Standards & Citations

W3C Web Audio API — AnalyserNode Specification
W3C Recommendation • External Reference ↗
Cooley-Tukey Fast Fourier Transform Algorithm (IEEE)
IEEE / Math. Comp. • External Reference ↗
On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform (F. J. Harris)
IEEE Proceedings • External Reference ↗
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