As I was walking, I heard a low rumbling sound making its way down the street. (theexpeditioner.com)
In a follow - up piece on Newsweek's website, Kliff described her experience writing the original story, of watching an abortion for the first time: «The suction machine made a slight rumbling sound, a pinkish fluid flowed through the tube, and, faster than I'd expected, it was over. (faith.org.uk)
Buried pipes and blowers flushed excess moisture out of the soil and fed oxygen to the turf while producing a muffled, rumbling sound suggestive of a volcano about to erupt. (si.com)