Electromagnetic Interference Shielding in Ethiopian Orthodox Church Manuscript Storage Vaults at Lalibela
埃塞俄比亚拉利贝拉东正教教堂手稿储藏库的电磁干扰屏蔽设计
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Vault walls incorporate layered ferromagnetic clays sourced from nearby Rift Valley deposits, tuned to attenuate 1–3 GHz frequencies generated by nearby mobile network infrastructure.
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Shielding effectiveness was validated using vector network analyzers measuring insertion loss exceeding 62 dB across critical bandwidths for digital preservation equipment.
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