Tin foil hat radio with a metal bucket. The AM radio is completely inside a metal enclosure. This leads to a noticeable reduction in signal strength received by the AM radio. The efficiency of a metal enclosure in blocking electromagnetic radiation depends on the thickness of the foil, as dictated by the "skin depth" of the conductor for a particular wave frequency range of the radiation. For half-millimetre-thick aluminum foil, radiation above about 20 kHz (i.e., including both AM and FM bands) would be partially blocked, although aluminum foil is not sold in this thickness, so numerous layers of foil would be required
Franklin Foil Franklin Foil Franklin Johnson Foil (born October 31, 1964) is a Republican member of the Louisiana House of Representatives for District 70, which includes a portion of Baton Rouge. In 2008, he succeeded term-limited Republican Representative Carl Crane, the former chairman of the House Education Committee. To win the seat, Foil defeated fellow Republican attorney Pat Culbertson. Foil was born and reared in Baton Rouge, as one of two sons of Frank Foil and the former Judith Johnson. He graduated from Louisiana State University in 1987 with a Bachelor of Arts in Political Science and in 1991 received his Juris