I am working with audible sound profile and want to analyse the frequency of that sound profile. So, Is there any method by which frequency could be analysed??
Frequency of any audible sound can be analysed using FFT (Fast Fourier Transform). Best way to analyse Frequency of Audible sound can is by using SLM (Sound Level Meter). This has best Microphone which can pick sound from 20 Hz to 18kHz. Other Microphones dose not have such a good Frequency Response.
At the first instance, I would rather suggest to use a simple microphone (condensor mic) with PC sound card and run some freely available spectrum analyzer software. Once you are satisfied with the "CLUE" data, you can then go for a sophisticated instruments with flat/almost flat mic/system response with dB level frequency curves.
Please see the following sample code.
clear all;clc
Fs = 4000;
N = 10000;
M= 12;
w=[200, 1000]*(1/(Fs/2));
[num,den]=butter(M,w);
[numd,dend]=freqz(num,den,1024,Fs);
plot(dend,abs(numd));
Best of Luck
you can take a look at any audio file using audacity. It's free, simple and easy, and it can record audi and produce a frequency spectra for any period of the recorded signal.
Otherwise you can use matlab or labview, or you can use a sound analyser
If you are looking for an easy open-source software, Sonic Visualizer is excellent with spectrum, spectrogram, annotation, frequency tracking, and many other metrics (included or as plugin) etc.
http://www.sonicvisualiser.org/
As said above, FFT is the tool to transform the time signal to the frequency domain. After that, it depends on the info you want to obtain about it.
I have used audacity for many years and it is very easy to use. It is also an open source project so you can download and contribute if you use it. http://audacity.sourceforge.net
It's a good start point for anyone who is a novice as there is a good community of intelligent users supporting the program.
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