This is my matlab code to get an input via mic and another one that will be a pre-recorded one ,i have used fft in order to plot the graphs in freq domain.Please could anyone suggest me the way or any algorithm to be used to compare these 2 plots ?

%Necessary Variable initialisation and Functions function[norm_voice,h] = Voice_Rec(sample_freq); option = 'n'; option='a'; record_len = 1; %Record time length in seconds sample_freq = 8192; %Sampling frequency in Hertz sample_time=sample_freq * record_len;

%Get ready to record your voice To Give The Command option_rec = input('Press y to give the command: ','s'); if option_rec=='y' input('Press enter when ready to record--> '); record = wavrecord(sample_time, sample_freq); %Records the input through the sound card to the variable with specified sampling frequency end

%using Fast fourier Transformation the Run Time Command of frequency domain %Spectrum is Generated [H,W]=freqz(record,1,1000,sample_freq); subplot(211) plot(W,abs(H)),title('Frequency Spectrum of the recorded command'),xlabel('Frequency (Hz)'),ylabel('Ampltide') xlim([100 500])

%Taking FFT x=fft(record)

%The Saved Wav File Frequency Domain Spectrum file = 'DESKTOP/balaji start.wav'; a= wavread(file);

%FFT For Saved Wav File in Frequency Domain spectrum [H,W]=freqz(a,1,2048,sample_freq); subplot(212) plot(W,abs(H)),title('Frequency Spectrum of balaji start'),xlabel('Frequency (Hz)'),ylabel('Ampltide') xlim([100 500])

%Takin FFT y=fft(a)

[José-Luis]

Please edit your post.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

Are you sure that matlab coder is an appropriate tag here? MATLAB Coder is a product for converting MATLAB code to C code.

http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags

Answer 1

[Wayne King]

If you want to compare two signals in the frequency domain, look at the help for mscohere.m

You can see an example here:

https://www.mathworks.com/help/signal/ug/cross-spectrum-and-magnitude-squared-coherence.html