-----Original Message----- From: Angela Kemmler > It was Piantelli who first talked about pulsating hydrogen pressure. It was not Andrea Rossi.
Are you certain Piantelli was first for gas phase ? The more general topic of 'pulsation' in LENR goes back many years to sonoluminescence (sonofusion). Perhaps before that. Of course, that was in the liquid state. Then, there is definite audible levels in glow discharge experiments. Much higher frequencies can be involved, but that is plasma phase. I think it is important to determine the first instance of pulsation in gas phase. It is probably not patentable due to prior art. Hagelstein, among others, apparently has claimed that the pulsation is critical to success in the Rossi device, and perhaps sine qua non. He is well positioned to know this. BTW - this does not in any way mean that the inventor himself is aware of it - if the pulsation frequency is so high that it is far beyond audible, even with lower harmonics. As to "how" ... pulsation can happen in a way that the inventor is unaware or only mildly aware, and assuming that we are not bound to strict definitions of "sound" - then the most likely mechanism is via phonons at nano-geometry, i.e. IR (infrared) anomalous vibration excursion levels due to nanopowder properties, or excitons. This may be a new instance of excitons in a thermal application. This too goes back a long way in itself. Often the descriptor which is used is 'anharmonic vibration'. The effective pressure is much higher than what is seen in sonoluminescence. Jones
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