RNNoise: Learning Noise Suppression
Oddly, I found the RNNoise suppression more distracting than the less sophisticated Speex suppressor.  If you'll forgive the figurative language; compared with the noisy tracks, speex de-emphasises the noise into a quieter but smoother robotic 'bokeh', which allowed me to concentrate on the main speakers.RNNoise on the other hand seemed to detect silences well, but left artifacts in the speech such that it had a choppy and artificial feel.  Lacking the smoothness in the background I found I was more distracted by the distortions in the words.