I have measured the electric field inside my house and it is huge. It is very active on specific frequencies: 5kHz, 10kHz, 15kHz and around 20kHz. These make a horrible noise to people with high sensitivity to electric fields. If I cut the power (phase and neutral), all goes away.

So what I need is a low pass filter that will let the 50Hz pass and block anything above 2000Hz, for example. Anybody knows of companies that provide this? All I can find are simple devices for one plug. I need it for the entire house. Thanks!