is it normal to loose some hearing capabilities when you are bent down

example i bend down with my back to reach for something on the floor and my hearing starts acting up like if i were wearing a pair of noise reduction headphones or something and returns to normal when standing upright

As always, you should be checking with a medical provider regarding anything having to do with hearing loss. I’m not a provider, but I work with a lot of hearing impaired individuals. It is possible that you have fluid in your middle ear that is shifting when your head is bent over. It is also possible that you have something called ‘pulsatile tinnitus’ where you are hearing your own blood rushing when your head is down and that is causing other sounds to be muffled. Pulsatile tinnitus can be the symptom of something more serious, so you really need to get checked out by a qualified ENT