They built three foil helmets, put them on subjects in an anechoic chamber, and swept radio frequencies from ten kilohertz to three gigahertz to measure what the foil did. The helmets attenuated most bands as expected. But at certain frequencies they did the opposite. They amplified the signal, by as much as thirty decibels.
The bands that got boosted were the ones allocated to GPS and mobile service. The paper was written as a joke. The measurements were real.
Specifications ∴ Medium-heavy 8.0 oz/yd² (271 g/m²) · 50% cotton, 50% polyester ∴ Classic fit · spacious kangaroo pocket · double-lined hood ∴ Color-matched drawcord · tear-away label, no scratch at the neck ∴ 100% ethically grown US cotton · US Cotton Trust Protocol member ∴ OEKO-TEX certified dyes, low environmental impact ∴ Heather Sport colors: 60% polyester, 40% cotton
Use code INNERCIRCLE for 10% off your first order.
