Hot Chocolate Effect

The hot chocolate effect, also known as the allassonic effect, is a phenomenon of wave mechanics first documented in 1980 by Frank Crawford, where the pitch heard from tapping a cup of hot liquid rises after the addition of a soluble powder. It was first observed in the making of hot chocolate or instant coffee, but also occurs in other situations such as adding salt to supersaturated hot water or cold beer.

via TYWKIWDBI

Who We Are
Alex Boese Alex is the creator and curator of the Museum of Hoaxes. He's also the author of various weird, non-fiction, science-themed books such as Elephants on Acid and Psychedelic Apes. Paul Di Filippo Paul has been paid to put weird ideas into fictional form for over forty years, in his career as a noted science fiction writer. Contact Us

Posted By: Alex - Thu Nov 12, 2020
Category: Noises and Other Public Disturbances of the Peace | Science

Comments

Mr. Wizard knows about this, rest assured.

Posted by Virtual in Carnate on 11/12/20 at 11:37 AM

I've noticed the phenomenon, but had no idea that it actually had a name. In my experience, it helps that one has a glass container to be noticeable.

Posted by KDP on 11/13/20 at 08:30 AM

Interesting. I thought Sixty Symbols had done a video about it as well, but I can't find it.

Posted by Richard Bos on 11/14/20 at 07:56 AM

Commenting is not available in this channel entry.