Many thanks for everyone's comments.
I decided on the Sony WH1000-XM4; got them yesterday from Amazon & will probably try them mowing the lawn maybe later today. Or tomorrow, or the next day......
I'm impressed by the adjustments, features, etc., available through the phone app. The equalizer feature is a nice adjustment when I listen to music, a podcast, or whatever.
I tried them sitting on my lawnmower running in the garage (not for too long, since I'm still here....) and am completely happy with the noise canceling.
FWIW, I paid $279 from Amazon, bundled with a a "battery bank" that incorporates an inductive charger, with our iPhones can make use of.
Sony WH1000-XM4 Bundle
All in all, very impressive technology. What a wonderful time we live in.
