A mechanically resonant marker comprises a strip of magnetic glassy metal alloy that has been annealed in a furnace for a predetermined time at a plurality of temperatures.

You can choose from two types of waveguide - ‘tube’ adds the resonance of a cylindrical object such as a drum body or long pipe, while ‘strings’ adds the metallic resonance of a string.

Personally I established, in 2001, a list of networks and their metallic resonance thanks to the bioenergy (published in 2004 in Sacred Geometries, volume 1).