Read (or skimmed) the article and I'm not an English native speaker but... TIL that "hair" can be used also for hearing related things? I thought that hair was just "any of the fine threadlike strands growing from the skin of humans, mammals, and some other animals."
The tiny sensors inside your ear are nerves attached to hair of various lengths. It's specialized, but it's recognizably the same thing as the kind on the outside of your body.
"Hair cells are the sensory receptors of both the auditory system and the vestibular system in the ears of all vertebrates, and in the lateral line organ of fishes. Through mechanotransduction, hair cells detect movement in their environment.[1]"
We have ultra fine hairs in our ears that wiggle when sound waves travel over them and those hairs bases are connected to receptors that capture those wiggles and send it to your brain. Thats (extremely roughly) how your ears work.
