@katherinebouton I did purchase the ebook but have not had much chance to read it yet.
I use the Connect Clip in some of my water aerobics classes! One of the leaders is young with a high voice, my most difficult frequencies, and she leads from the side of the pool, not in the water. I wear my HAs in the water, my ears never come close to submersion. I am disappointed with it in restaurants though, the background noise gets amplified too.

Thanks for writing a helpful book, there is a need for this.
JK