A fifth-grader has written this blog asking for help with a science project... does anyone have any theories on the sound level (dB) and frequency (Hertz) of the average hand clap? I think he's trying ...

Clapping is both a scientific event and a social gesture. A study explores the complex physics behind the sound of clapping. The noise originates from compressed air, not just hand collisions.

Most of us think clapping is just about two hands hitting each other, but new research out this week in the journal Physical Review Research found that the clap that we hear actually comes from the ...