Tin foil hat - Wikipedia

A man wearing a tin foil hat A tin foil hat is a hat made from one or more sheets of tin foil or aluminium foil, or a piece of conventional headgear lined with foil, often worn in the belief or hope that it shields the brain from threats such as electromagnetic fields, mind control, and mind reading. The notion of wearing homemade headgear for such protection has become a popular stereotype and by

[nurumizu]

スズ箔の帽子：金属ホイルハットが着用者の脳に入射する無線周波数放射の強度を著しく減少させるという考えは、強い電波の影響がかなり長い間文書化されているため、科学的な妥当性を有する。