Has a frozen pea in a whistle ever actually happened to you in real life? This is a concern to me because I spend a lot of time in snow country.
On the Internet, people often talk about the danger of a pea freezing in a whistle, but I could not find anybody who described this phenomenon actually happening to them. I blindly accepted this assertion anyway because it seemed to make sense. Then, I got a bit irritated because one of my favorite whistles has a pea, the venerable Storm Whistle
http://www.stormwhistles.com/ (no affiliation). Some people erroneously describe this whistle as not having a pea, but it definitely does.
Anyway, I conducted an experiment with several whistles. I turned the temperature down on the freezer to as cold as it would go. I don't know what temp that would be, but let's just say the ice in the freezer was already rock hard before I turned the temperature down more. Then, I took the following five whistles and dunked them in a bucket of icy water:
1. Storm Whistle (synthetic pea)
2. Fox 40 Sonik Blast (pea-less)
3. Fox 40 Sharx (pea-less)
4. No-name metal whistle (synthetic pea)
5. No-name plastic whistle (synthetic pea)
I took those whistles, still filled with water, and placed the whistles in my freezer. You may ask why I didn't freeze the whistles in a bowl of water. Well, I'm less interested in that experiment because I don't think that simulates real life conditions for me. Also, I'll assume NO whistle works while it's inside a solid ice block.
Next, I allowed the freezer to freeze the whistles. Then, I stuck my head in the freezer to blow each whistle. (Yeah, I can think of about 10 jokes too.) Each whistle was caked with frozen water at this point.
Here's the result:
NONE of the whistles froze up. They all worked as if I had not even frozen them. This result makes me feel more comfortable with carrying my Storm Whistle in the freezing cold.
My educated guess is that a pea freezing is a concern for peas that hold moisture, for example, cork peas. This urban legend turned into people making general statements about all peas. By the way, who in the heck deliberately carries a whistle having a cork pea? I don't even own a whistle with a cork pea.