AIAS member Steve nannister gave the hint to a video by Bob Greenyer of the Martin Fleischmann Memorial Project. Bob is just one of the fundamentally smart people in the space. In this video he explores and extends the work of, e.g., Hutchinson, Shoulders, and others:
https://www.youtube.com/watch?v=nA5XFkF3U2A&feature=youtu.be
ECE theory provides the foundation for such developments. First, one has to use the right vocabulary. “Scalar waves” are longitudinal waves in ECE (and general scientific) speaking. We have done a large number of papers on this, accumulated in chapter 3 of the book Prinicples of ECE Theory, vol. 1. Mathematically, such longitudinal waves are Beltrami fields. Examples are shown in the book. These waves are solutions of Maxwell’s equations and can be understood even by standard electrodynamics.
What is called “matter waves” are waves of stress in the vacuum. They can be longitudinal or transversal. In the longitudinal case, they are also called “scalar waves”, giving confusion with the wave types described above. The non-empty classical vacuum in ECE theory is filled with scalar and vector potentials of a form that does not produce force fields (e-m fields). The Aharonov-Bohm effect, although being a quantum effect of electrons, is produced by such potentials or “potential fields”. They can be constructed by e-m fields that annnihilate themselves completely. The energy density of the space remains and can have wave character. They then expand as pure “energy waves”. The ECE vacuum is described in UFT papers 292, 296, 299 on www.aias.us and in the book Principles of ECE theory, vol.2, chapter 6. There is also a popular article on this:
http://aias.us/documents/miscellaneous/PotentialWaves.pdf
The waves are similar to sound waves in solids where the atoms oscillate around an equilibrium position but no matter is transported. In case of potential waves, the oscillating “material” is the vacuum itself. According to Tesla, the vacuum has a microscopic, discrete structure consisting of very small “vacuum particles”. These particles are what oscillates in potential waves, without giving rise to e-m fields.