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Sound Analysis with Matlab Implementation

5.0 | 7 ratings Rate this file 93 Downloads (last 30 days) File Size: 338 KB File ID: #38837 Version: 1.3
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Sound Analysis with Matlab Implementation



30 Oct 2012 (Updated )

Time and frequency analysis, measurement of the crest factor, the dynamic range, etc.

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The present code is a Matlab program for signal analysis of a given sound file. The analysis includes:
1) Plotting of the:
- signal in the time domain;
- signal in the frequency domain (spectrum);
- signal in the time-frequency domain (spectrogram);
- amplitude probability distribution of the signal;
- autocorrelation function of the signal.
2) Displaying of the:
- minimum and maximum value of the signal;
- standard deviation (RMS-value);
- mean value (DC-value);
- crest-factor Q;
- dynamic range D;
- autocorrelation time.
The code is based on the theory described in:

[1] D. Manolakis, V. Ingle. Applied Digital Signal Processing. Cambridge, Cambridge University Press, 2011.

[2] G. Heinzel, A. Rudiger, R. Schilling. Spectrum and spectral density estimation by the Discrete Fourier transform (DFT), including a comprehensive list of window functions and some new flat-top windows. Germany, Hannover, Max-Planck-Institut für Gravitationsphysik, 2002.

[3] I. Tashev, A. Acero. Statistical Modeling of the Speech Signal. IWAENC 2010, August 30 - September 2 2010, Tel Aviv, Israel.

[4] M. Mijic, D. Masovic, D. Pavlovic, M. Petrovic. Statistical properties of music signals. 126th AES Convention, May 7 – May 10, Munich, Germany. Proceedings of papers, p. 7702, 2009.

[5] Хр. Живомиров, Д. Пламенова. Изследване някои параметри на аудио сигналите. Национална конференция с м.у. „Акустика 2012”, 12 Октомври 2012, Варна / Списание Акустика, ISSN: 1312-4897, год. XIV, бр. 14, стр. 89-95, 2012.


This file inspired Plotpsd.

Required Products Signal Processing Toolbox
MATLAB release MATLAB 8.4 (R2014b)
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Comments and Ratings (9)
04 Dec 2016 Sean Jungst

Thanks a lot! This code helped me create a very interesting GUI project for my Matlab class.

04 Oct 2016 Sueng-Wan Cho

Very nice..
Question) How can i interpret from the autocorrelation graph & value ?

what is the autocorrelation of the music signal?

09 May 2015 Özay Özçelik

28 Sep 2014 Hristo Zhivomirov

Hi, Nguyen! The basic reason for a minus sign in front of some dB value is because the logarithm of a number 0<x<1 is negative.

Comment only
26 Sep 2014 Nguyen Thanh Phong

Why dB have "-"?

Comment only
19 Sep 2014 Nguyen Thanh Phong

Thank you very much!

10 Jun 2014 Michael

11 Feb 2014 helal

helal (view profile)

08 Apr 2013 Mardare Ionut

14 Apr 2014 1.1

Calculation of the autocorrelation function of the signal is added.

18 Jun 2016 1.2

A new version of the code has been uploaded.

18 Feb 2017 1.3

A new version of the code has been uploaded.

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