mumblings in a sentence

1. Later we replayed the tape and as I had feared the earlier mumblings of my visitor were completely inaudible.

2. I first heard mumblings about bitcoin in late 2012, but I didn’t really pay much attention to it at the time.

3. Today, Bakuninist anarchism lives on mostly in the mumblings of utopian political critic Noam Chomsky, who often defends Marxist regimes while seeking to distance himself from their destructive behavior.