Electrical wires are both a source and recipient of electromagnetic fields and interference. Voltage in the wires creates electric fields, Current creates magnetic fields, and high frequencies create "noise". Shield these fields with the following products.
Reduce your EMF exposure from most likely sources. Shield your phone with a case or pouch, your modem with a signal tamer, or your lap with a HARApad. Hardwire your internet with Cat7 cable. Many other EMF shielding options available.