For comparison, here is an image of liquid being subjected to vibrations (from Hans Jenny’s book “Cymatics, Volume 1”, page 58): Underneath is a tulip growing from a rounded surface with swirl patterns reminiscent of cymatic patterns in liquids. Their inner floor is made of dirt and raised off the ground at varying levels, which Callahan theorizes was to allow fine tuning of the resonant frequency inside the tower by varying the height of the inner space. If you read the works of Phil Callahan you’ll know these towers, made of highly diamagnetic stone, served exotic/occult functions. It’s also worth mentioning that this stone is positioned right in front of a round stone tower. The result is greater acoustic output from a given driver. The horn can be thought of as an “acoustic transformer” that provides impedance matching between the relatively dense diaphragm material and the air of low density.
#Tuning fork a driver#
The horn itself is a passive component and does not amplify the sound from the driving element as such, but rather improves the coupling efficiency between the speaker driver and the air. Horns have acoustic applications, as explained on Wikipedia:Ī horn loudspeaker is a complete loudspeaker or loudspeaker element which uses a horn to increase the overall efficiency of the driving element, typically a diaphragm driven by an electromagnet. To the right of the fork is what looks like an anvil, ax-head, or horn.
Also, the Pict/Celt civilization traces back to Bronze Age. Other materials like stone, iron, copper, and wood are unsuitable. This fork was likely made of bronze, just as bells are made of bronze, due to the ideal stiffness and resilience of the material allowing for prolonged vibrations. A hammer would be needed to strike so large a fork. If both are drawn to scale, then the tuning fork is quite large. There you clearly see a tuning fork and hammer. I will provide some information in this note regarding these applications.įirst consider this photo of the Abernethy Pictish Stone in Perthshire, Scotland: The alternative health community uses tuning forks for healing purposes.īut what did the ancients use them for? I believe they were mainly used to cut, drill, and levitate stones. Nowadays they are used mainly for testing hearing, tuning musical, keeping time in a quartz watch, and teaching the principles of vibration and resonance in the classroom. Unofficially, their existence traces back to ancient Celtic and Egyptian times. Officially, tuning forks were invented in 1711 by John Shore, a British Musician.