Rick Crammond of British Columbia wrote in to share a test he conducted where he attempted to block a wireless modem’s signals using a stocking cap covered in tinfoil, in essence creating a Faraday cage for his head. While the direct benefit of a tinfoil hat remains unclear, it’s interesting how easily these ever-present signals can be deliberately blocked.

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal

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