Try to check "Mishin coils" It is planar coils with specific winding feeded mostly with coil self resonance frequency, however some people use other frequencies, waveforms and even music to power that coils.
I don't know how it could be named in English and if there is some analog on the West, but try to use online translator on this Russian forum section https://x-faq.ru/index.php?board=174.0 You will find detailed instructions, diagrams, circuits and step-by-step howtos on building that devices.
Results are controversial. Mishin coils definitely somehow interact with humans, but whether it be positive or negative result, and on what things it depends is unclear. There are a lot of replication stories on the above forum, so judge yourself.
Try to check "Mishin coils" It is planar coils with specific winding feeded mostly with coil self resonance frequency, however some people use other frequencies, waveforms and even music to power that coils.
I don't know how it could be named in English and if there is some analog on the West, but try to use online translator on this Russian forum section https://x-faq.ru/index.php?board=174.0 You will find detailed instructions, diagrams, circuits and step-by-step howtos on building that devices.
Results are controversial. Mishin coils definitely somehow interact with humans, but whether it be positive or negative result, and on what things it depends is unclear. There are a lot of replication stories on the above forum, so judge yourself.