Thread Subject: How to plot signal with new startindex and endindex

for i=1:L
    if energy(i)>z
        startindex=i
    end
end

energy2=energy(end:-1:1);
for i=1:L
    if energy2(i)>z
        endi=i;
        endindex=nframes-endi+1
    end
end

Hi, I now have a new startindex and endindex of a Wav file, as I have removed the noise. How do I now plot this and play it?

Thanks