Once you have a noise spectrum (which you do), then, from a textbook perspective, the next step would be to apply a Wiener filter: https://en.m.wikipedia.org/w

Once you have a noise spectrum (which you do), then, from a textbook perspective, the next step would be to apply a Wiener filter: https://en.m.wikipedia.org/wiki/Wiener_filter https://en.m.wikipedia.org/wiki/Wiener_filter