While these did block the noise, instead, my breathing and heartbeat were amplified
I probably won't use these; since they weren't expensive I probably won't return them, but when I used them to block my wife's snoring, unlike my Anker headphones, instead of silence, I could hear my heartbeat and my own breathing so loud, that was as bad as the snoring.  The Anker ANC headphones while uncomfortable to sleep with give me a wonderful pure silence.  I'm going to look for active noise canceling buds instead.
Rating: 3 stars