"Casey Wilson" N2310D @ gmail.com wrote

The whistles I used when I was a zebra on the basketball court work
great. They are now standard items in my survival packs. Batteries not
required. Never measured the DB level but I recall a rescue team having to
hike some considerable distance to find a kid sitting on the side of a
mountain blowing away on one. I think I gotta pass on this gadget.

Yep, a solution without a need. g

I used to blow on one as a marching band director, and it had to be way over
the 125 decibels they advertise. When you blow on a whistle, your ears
pressurize, or something like that, and you can stand much louder sounds
while doing that.
--
Jim in NC