Whether you crack your knuckles or cringe at the sound when people do it, here’s why it happens
Physicist Helen Czerski explores the complex science behind familiar phenomena. Read more columnsI still occasionally find myself amazed at the details our ears and brains can pick up on. My quiet work time was recently interrupted by a person in the room next door.
I couldn’t see them, but I knew exactly what they were doing: cracking their knuckles. It’s such a distinctive sound, but what’s really surprising is that it’s so loud. The sound generated is noticeably different from that of creaking hips or knees—it’s specific to fingers. What’s going on?
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