Water bottles shield ultrasound but not EMF but sea water does
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[SHIELDING: HOME] Shielding with water bottles: fresh water vs. sea water vs. pool water attenuation

https://www.reddit.com/r/Electromagnetics/comments/3sjzpx/shielding_home_shielding_with_water_bottles_fresh/?
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Water bottles shield ultrasound but not EMF but sea water does - by energyweaponsatme - June 02, 2015, 23:15

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