Short time FFT with octave smooth

Version 1.0.0.0 (11.7 KB) by Matthes
Computes segmented FFT with optional fractional octave smoothing
3.5
(4)
3.6K Downloads
Updated 1 Apr 2008

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UPDATE: easy to use GUI added
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[Px,freq]=averfft(sig,Noct,Nfft)
sig = time domain data (e.g. audio file);
Noct = octave resolution for smoothing (e.g. Noct=3 results in a 1/3-oct. smooth),
default value is 0;
Nfft = FFT resolution, default value is 8192;
sampling frequency assumed to be 44.1 kHz.
If no output is defined averfft plots the frequency spectrum.

Cite As

Matthes (2026). Short time FFT with octave smooth (https://www.mathworks.com/matlabcentral/fileexchange/19228-short-time-fft-with-octave-smooth), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2007b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Acknowledgements

Inspired: 1/N-Octave Smoothing, Long term average spectrum

FrequencyPlot/

Version Published Release Notes
1.0.0.0

multiple selection problem fixed