Why our brains hear words and songs in random noise

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Why our brains hear words and songs in random noise
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Hearing and psychology experts explain audio pareidolia, or why your fan sounds like it’s talking to you.

typically starts the same way. You’ll hear a conversation between two familiar voices, or the lyrics to a beloved song. It’s alarming because, as far as you know, you’re alone, and there’s no music playing either. The only noise in the room is the uneven vibration of a fan or the sound of water rushing from your shower head.

While it feels somewhat like a hallucination, hearing and psychology experts assure us that it’s not. Instances of audio pareidolia are different from hallucinations in that you’re mishearing actual sounds in unusual ways. Sometimes that’s a bit far off from what the actual noise is. Your brain is very good at finding patterns and adding significance to random input. That’s why you understand that loud noises are a sign that you might be in a dangerous situation—a useful evolutionary advantage.

But there is a similarity between the fuzziness itself and the speech you manifest from it, explains Robert Remez, a professor of psychology at Barnard College. Experimentsattempted to see how well people understood speech with concurrent noise. Researchers took highly intelligible speech produced by a careful talker, and mixed in tones of equal intensity that were distributed randomly over the frequencies of the human auditory range—aka white noise.

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