Problem with white noise and wav file

[x, fs ] = wavread('hola.wav');
t = 0:1/fs:1;
% Genera  Ruido blanco
L = length(t);
var = 2;   % varianza
k = randn(1,L);   % ruido no uniforme
mean1 = 0.0;    % media
ruido = mean1 + sqrt(var)*k;   % ruido blanco
x=ruido;

what is the problem? It will no audio signal with the noise but there is only noise, as is done to be both simultaneously I hope answers thank you

Answer 1

[Iain]

It looks like you're doing:

 signal = valid_data_read_from_file; 
 noise = randomly_generated_noise;
 signal = noise; % remove the signal entirely and replace it with noise

You should be doing

 signal = signal + noise;

[jonh]

Hi there Does not work If you want I send you the files so that you verify I hope your answer Thank you