WHY IS MY CELL PHONE RINGING INSIDE THE HAT?
The answer is: The signal around must be stronger than the hat is able to completely attenuate.
Signal-blocking hat is not a magic. It’s the pure physics. Special shielding fabric can shield only the particular spectrum of electromagnetic radiation. Generally, the shielding effect is up to ≈80db. If the signal around is more than this value, what is the very normal and common situation, your cell phone covered by hat will be ringing. But the received signal is reduced almost to the null. It’s the same with waterproof, windproof, bulletproof or other proof materials. If you start shooting from the machine gun to the bulletproof vest, it will fail. If you expose the waterproof jacket to the storm, it will fail. If you expose the windproof pants to the hurricane, it will fail. But you will still stay somehow more protected and comfortable than you would be without it. Signalproof feature is not 100% protection, but it’s worth having it.
🤣 – very Brass Eye
there’s no real evidence for it – but it is scientific fact…
EDIT: the whole FAQ is hilarious, I’m reading it to myself in an Adam Buxton voice:
If you are thinking about signals that come through other parts of body and hit the inside of the reflective side of apparel, then pass back through the body a second time or stay inside and multiply their power, then you have to know that it is ridiculous. The signal is not a bullet and the apparel / hat is not an amplifier. It’s like giving a question, “why do i feel cold in my winter jacket, it was supposed to protect me against cold and it comes through my sleeves, top and bottom parts.”