I don't know about the freestyle Libre but as far as the cell phone, I mute the phone and just hear the vibrations and that helps me. Also, there's a knob on my dryer alarm and I can turn it to the off position.

Iv always had noise intolerance can't cope with raised voice.

Yes I try to avoid when I can like turning the microwave off before the end, also turning sound down on everything ☹️

Yes I’m sound sensitive as well. Also smell and touch sensitive Some colours make my tummy sick.

You are so right about the liud tv. My husband wont get hearing aides either and sometimes when i am watching tv in my bedroom, the loudness of my hubby's tv downstairs comes tgrough the vents. Its not the dosages about my insulin but the alarm going off all the time. We keep trying to fine tune it but I'm what they call a brittle diabetic and very sensitive to insulin. Thanks for your comments!