We use that as a base together with the original sound using a differential filter, everything that is common is rejected, the noise cancel it self out and everything that is not, pass through. To restore the audio to sound natural again, is possible to do what I did to the whole sound (effect > voice reduction and isolation, Isolate and Invert vocals, Strength 4.60, use previous frequency's for low and high), use it like a alpha channel in Photoshop/Gimp. Notice that you can remove a good amount of the noise and trashing a good portion of the frequency we need making it sound like a radio. Here a small sample from your file, if you look over the track and zoom in at the parts that has this noises, you see that it does a common pattern around 196 Hz to 3694 Hz more or less, it looks like a morse code, you'll see a series of peaks.
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