Download the FreeShield at:
http://freeshield.com/images/1024x1024-FreeShield.jpgPrint it on a A4 paper. Do not cover it with a plastic.
It creates a shielding field.
Print 5 A4 papers. Staple them together, so each over each other, as a 5 layer A4.
This A4 layer creates a field of ca. 5 meters, and reflects longitudinal waves.