you need to design a filter notching at the beginning of frequency that has distortion i guess.
try this code and tell me what happen with u on Matlab:
clc
[x,Fs,bits]=wavread('f17.wav');
Fs
T=length(x)/Fs
figure;
stem(x(1:100));
title('First 100 samples of noised signal');
grid
xf=fft(x,16000);
xfm=abs(xf(1:8000));
figure;
plot (xfm(1:8000,1));
xlabel ('Frequency ( Hz )');
ylabel ('Magnitude');
grid
figure;
freqz(x,Fs)
grid
spectrogram(x,512,250,512,Fs);
h1=Filter1;
h2=Filter2;
freqz(h1,Fs);
freqz(h2,Fs);
a= filter(h1,x);
y= filter(h2,a);
spectrogram(y,512,250,512,Fs);
sound(y*200,Fs,bits)