These are some great tips! I too have become more comfortable using my phone with a headset. I'd dig a geodesic dome that scatters the waves =)
I don’t think resonance will impact heavily tho - it’s attenuating 70dB signals - your harmonics and TOIs are gonna be tiny tiny fellas. Even anechoic chambers are coated with a good conductance (that and it’s absorption foams). I also love the conductance capacity - energy inducing fabrics are game changers.
I am curious on shorter wavelength attenuation results - I’d reckon this materials are solid blockers until 12GHz which is incredibly decent - it may not cover your terahertz and gamma rays but that’s expected as you need concrete and lead for that.
I am still a little paranoid on Bluetooth esp class A hitting 20dBm. Doing a bit of deep dive on that. If I have anything on me that receives signal, I need it to absorb and emit least amount of radiation, one that is safer than taking a walk in the city kind