The results: The hand configuration that produced the loudest clap—85.2 dB—consisted of holding the hands 45 degrees to each other with the palms partially overlapping.

Understanding the physics of hand clapping, Fu says, could help develop methods to identify people by their claps — for example, allowing users to log into a device based on their unique clap.

Actor Ranbir Kapoor's recent workout video, featuring him performing hand-clap pull-ups, has gone viral. Experts share if you should try it too. Monday, Jun 23, 2025. New Delhi o C.