silence detection using std and mean of the entire audio

Hello everone,

I have a problem getting a proper result from this code. at the the code, I get a tic tic sound instead of a voice. could you please help me with the code.

clc

my_audio = audioread('recvoice.wav');

fs = 16000;

f_dur = 0.1;

f_len = f_dur * fs;

N = length(my_audio);

no_frames = floor(N/f_len);

new_data = zeros(N,1);

count=0;

avg_noise = mean(my_audio); % calculating the average of the whole signal

std_noise = std(my_audio); %calculating the std of the whole sig

for j=1:f_len:length(my_audio)

for k=j:j+f_len-1

b(k) = (my_audio(k)-(avg_noise))/std_noise;

if b(k) > 3*std_noise

count = count+1;

new_data((count-1)*f_len+1:count*f_len)=my_audio(k);

end

end

end

figure(1);

plot(my_audio);

figure(2);

plot(new_data);

sound(my_audio);

pause(5);

sound(new_data);