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In order for aluminum foil to act as a shield, it needs a physically wired connection to a grounded source to drain any electrical signals. Otherwise, if not grounded, the foil acts as an antenna, amplifying any signals, transmitted and recieved.
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In order for aluminum foil to act as a shield, it needs a physically wired connection to a grounded source to drain any electrical signals. Otherwise, if not grounded, the foil acts as an antenna, amplifying any signals, transmitted and recieved.