That's right, snakes do feel vibrations...things like a vacuum, for sure. They can feel bass notes* but not higher frequencies (like your voice & your macaw).
*We can feel bass notes too...put your hand on your snake's cage (glass or plastic) & you'll verify that, but it's just that we can also hear so well that we don't
need to use touch in that way...we sorta forget that we can.My snakes give "dirty looks" when I vacuum near their cages too, LOL. They also look out if
I play loud music- again, stuff with more bass.