This video shows a professor with what looks like a microwave waveguide horn aimed at his cranium, who then describes hearing a "click" or "chirp" with a "tonal quality" to the noise. How might a HAM recreate/demonstrate this microwave auditory effect? From a hackaday article, emphasis mine: "As an example – the weakest transmitter Frey used was able to output a power density of 4 w/m² at 1310 Mhz. The peak power was 2670 w/m². The US guideline for human exposure at that frequency is 6.55 w/m². A different transmitter Frey used measured 71 w/m² at 425 MHz, with peaks at 2540 w/m². Compare this to the FCC guideline of 2 w/m² at that frequency." From a paper first published in 1975, emphasis mine: "a microwave pulse with a slow rise time is ineffective in producing an auditory response; only if the rise time is short, resulting in effect in a square wave with respect to the leading edge of the envelope of radiated radio-frequency energy, does the auditory response occur. Thus, the rate of change (the first derivative) of the wave form of the pulse is a critical factor in perception." It's understood that doing this requires possibly unsafe power levels being aimed at the cranium. Will a HAM technicians license at 200w max accomplish this with a directional antenna, or will this require a general class to cover the peak power output? Would this require a Faraday cage to test responsibly? Is there a way to test such a setup responsibly? If that professor can demonstrate the effect safely enough to aim it at his own head, can this also be accomplished by amateurs? Is this better left up to the PhD holding professionals? What might a shopping list look like to demonstrate what was achieved in the video?