What is a longitudinal wave exactly?, well it's similar to a sound wave and sound waves also travel through a copper screen or Faraday cage.
It is true that Sound Waves are able to penetrate the Faraday Cage but not in the same way as an Electromagnetic Wave. Sound Waves consist of Physical Vibrations which aren't impeded by the structure of the Faraday Cage or by its Grid Dimensions. Would Very Low Frequency Electromagnetic Waves (at an Audio Frequency) be able to penetrate the Faraday Cage Electrically? As Tesla claimed, the wave must produce the greatest energy within the smallest time period to produce something similar to a solition wave with no reversal.
Is Tesla here describing a DC Pulse of exceedingly High Voltage and Short duration, or is he describing an RF Burst (RF Pulse) of Microwave Frequency with Exceedingly Small Pulsewidth? Both are very useful in High Powered Electronic Devices and, in a sense, are related functionally. Both of these Tesla was able to produce with his Disruptive Discharge and Hairpin Resonant Line but with rather low efficiency and without precision control. We today have the ability to produce both with Electronic Devices and with High Efficiency and High Precision. Therefore, it would seem that we should be able to "replicate" all that Tesla did in his time much more easily and predictably. Solid State Tesla Coils are a reasonably good example. Apparently our nerves also utilize solition waves which may explain why people have weird sensations around these devices such as vertigo.
In many respect it's a train wreck for both electronics and people which is why precautions are necessary.
Yes, that is a common complaint of those who have constructed their own High Powered Tesla Coils. A Soliton Wave Application that can be visualized.
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