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I use to work in blindness research, have several blind friends and also an ex-girlfriend who is blind. I know of no studies which show that blind people have super hearing, such as lower sensory thresholds. However they do become quite discriminating about what they pick up from their remaining senses, especially echoes and the like. I remember the girlfriend being quite interested in the acoustics of rooms and what you could hear of them in recordings.
Some things you can learn yourself. One guy I knew could tell the sex of who was walking down the street just by their footsteps. He showed me this many times and I finally asked him how he did it. He said that women generally had a lighter and crisper sound, for example think of the sound from stilleto heels versus full size heels for men. So I started trying this myself and found it was generally good way to tell men and women apart without seeing them.
I could imagine situations where this would not work but then I would be considered sexist.
Some things you can learn yourself. One guy I knew could tell the sex of who was walking down the street just by their footsteps. He showed me this many times and I finally asked him how he did it. He said that women generally had a lighter and crisper sound, for example think of the sound from stilleto heels versus full size heels for men. So I started trying this myself and found it was generally good way to tell men and women apart without seeing them.
I could imagine situations where this would not work but then I would be considered sexist.