The noise from the mineshaft recording began to change. Usually, noise suppression worked by subtraction—carving away the bad frequencies to reveal the good. But the NS1 v9135 seemed to be doing the opposite. It was adding clarity by hallucinating the missing details, painting the sound in with broad, hyper-real strokes.
If you encounter issues with this specific version on Mac OS: waves ns1 noise suppressor v9135 mac osxxdb
The string is almost certainly a typo or keyword stuffing artifact. The correct terms are: The noise from the mineshaft recording began to change