Do you need to be wearing ears?
I was shooting mine indoors and I didn't wear ears. No issues. 3.5 inch barrel with the Guardian 9 and Ammoclearance 147gr.No, I forgot to take them off. The are electronic so if I wear them for too long I forget I am wearing them.
I like it @NWS Compact Lightweight and Hearing safe not to mention price of ammo is not bad either.