Oh come on, SOMEONE has to mention Dune.
The sandworms? Sensed vibrations? Fremen walking in broken rhythms to keep from attracting them?
IMO, every creature with Blindsight should have specified what sense they're using for it. Bats (or anything that just lives in dark places) would use hearing, anything with Scent uses smell, anything subterranean uses touch (vibration). It's possible for some creatures to use multiple, in which case all need to be defeated to nullify the ability.
Silence beats hearing. Levitation beats vibration. Staying downwind beats scent.