Matching Spectral Descriptors: Time & Frequency Domain An

How to obtain the same output in spectral descriptors, using frequency and time domain inputs?

David Santos asked: 2024-03-14 Signal Processing , Audio Toolbox , Audio Processing Algorithm Design , audio spectral fea...

Achieve consistent spectral descriptors in MATLAB This guide shows you how to get identical results from frequency time domain inputs. Start analyzing sig...

Expert Answer

Prashant Kumar answered . 2025-07-11 11:52:09

%% Compare Time-Domain and Frequency-Domain Inputs
[x,fs] = audioread('Counting-16-44p1-mono-15secs.wav');
% Define window and overlap length
windowLength = round(0.025890625*fs);
overlapLength = round(0.01875*fs);
win = hamming(windowLength);
fftLength = windowLength;
% Calculate the power spectrum the same was as the spectral descriptors
[~,f,~,ps] = spectrogram( ...
    x, ...
    win, ...
    overlapLength, ...
    fftLength,fs,'yaxis','power','onesided');
% Slope using time domain input
slope_timeDomainInput = spectralSlope(x,fs, ...
    Window=win,OverlapLength=overlapLength,SpectrumType='power');
% Slope using frequency domain input
slope_frequencyDomainInput = spectralSlope(ps,f);
figure(1)
plot(slope_timeDomainInput,'ro');hold on
plot(slope_frequencyDomainInput,'b*');hold off
title("Error = " +rms(slope_timeDomainInput - slope_frequencyDomainInput))

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