[Shielding: Clay] If your soil is saline clay, wet clay or oil shale, please submit a meter report of your basement or cellar. If none, then an underground parking garage or office basement.

Papers are in the clay and shale shielding wiki.

https://www.reddit.com/r/TargetedEnergyWeapons/comments/61dygm/wiki_shielding_clay_and_shale/

Parts of Colorado, Utah and Wyoming have oil shale soil. 'Ground Penetrating Radar Disadvantages in Clay Soil and Shale

https://www.lincenergysystems.com/linc-energy-blog/entry/ground-penetrating-radar-disadvantages-in-clay-soil-and-shale#.WNBjh33XtCA

The suitability of clays to radar penetration is a function of their formation history. Clays which are transported (sedimentary) and their lithified derivatives (claystone, mudstone, shale etc) are generally very poor radar environments with an average of 3 m penetration possible with UltraGPR. However, tropical clays which are formed in situ by weathering are excellent UltraGPR environments, with over 50 m penetration possible.

http://www.groundradar.com/resources/gpr-myths

Texas has wet clay soil during the fall and winter rainy season. Is the clay lithified or formed in situ? Texas does not have basements and cellars. What states have wet clay soil and basements?

Please take a meter reading of your body inside the basement, cellar or underground parking garage as well as a reading of your body above ground. In your report, compare the two readings. See the milligauss meter app in the meters: android apps wiki and the meters: body voltage meter wiki.

If you have ultrasound hearing and still hear the hum in the basement, please take meter measurements next to your ears and above your head in the basement and above the ground. See the meter reports: ultrasound hearing wiki.