audio signal filtering for noise removal?

hello everyone, im doing a audio signal filtering and the approach that i'am following like >first i have recorded a audio signal without any noise, for this signal i have also calculated the PSD using fft and also calculated the average peak value considering some peaks in this psd plot

> next i have recorded the same audio signal, with a room ceiling fan as a source of noise expecting that this time i'll get some extra peaks in my PSD plot due to the noise.

>So, if i use the average peak value of the first signal i.e. without noise as a threshold to subtract the noise, will the noise going to suppressed . so i just wanted to ask can i follow this approach ???

[m rohith ananth ratnam]

hi madam, i think this code will help you to filter the noise from a speech signal, i this the noise signal is filtered by using spectral substraction

Answer 1

[prihatin oktivasari]

I try your code, but I has problem with:

Undefined function or variable 'wavread'.

Error in spectralenhancement (line 4)

[s,fs,NBITS]=wavread('ali.wav'); %Noisy signal