I've claimed special fingers, there are many ways to prove it should one particular thing fail on the day.
No. Each and every thing you intend to demonstrate should and will be treated as a separate claim.
Is that right? if I demonstrate the fading noise part, it's enough to prove my claim?
If there's an objective way to demonstrate it. If you truly think that there's a 100% chance of success, I'd go with this.
You say that this happens when you record stuff with the microphone. So, what I'd suggest is that you have a tone generator (a physical one, not a software one) and a metronome (again, a physical one, and I'd go for an old-fashioned clockwork one that makes a "clunk" noise, rather than a modern one that produces an electronic beep). You should also be in a room that is as free of ambient noise as possible. I would recommend hiring a recording studio for a couple of hours.
1
You start the tone generator making a noise, and set the metronome going at a slow speed. The metronome should be a little louder than the tone generator (this will help with the later analysis), but only a little. You record 30 seconds of this on your computer while everybody remains silent and nobody goes near any of the equipment. The folder into which the recording is saved is empty and has been checked beforehand by all parties.
When the recording has been generated it's loaded in to a program in which the waveform can be seen (I would recommend the free
Audacity for this). Anybody who is used to working with waveforms will be able to to recognise the shape of a waveform generated in this way (I can provide an example, if anybody wants me to) and will be able to distinguish the ticks from the tone. As the tone becomes quieter, the part of the waveform that represents it will become smaller.
It will be declared a pass if the amplitude of the tone portion of the waveform drops below a pre-agreed threshold (such as being 10% of what it was when it held steady
2) while the amplitude of the ticks remains consistent.
2 The amplitude is measured by highlighting a specific, small portion of the waveform that all parties agree is representative of the area they want to examine, filling the screen with the highlighted section with the "fit to screen" button, and then zooming in vertically so that a precise measurement can be made. The program measures amplitude on a scale from 0 to 1, to three decimal places, which should be precise enough for the measurements we're talking about, if the recording is of a decent volume.
3
That would be my preliminary suggestion for a protocol. I welcome criticisms and suggestions.
1And ensure that you have done this before the actual test, as well. Make sure you can do what you want to do in the environment in which you're going to do it. There's no point getting there on the day, finding you can't do it, and saying that it's the fault of the room.
This is the number 1 thing that people get wrong with JREF testing - they don't make sure that they can actually do what they're claiming to do in the way they're claiming to be able to do it before the test. Make sure you can. And I don't mean the day before, I mean before people are committed to coming to see you.
2What constitutes "held steady" and "remains consistent" is also agreed beforehand, as an empirical measurement.
3What constitutes "a decent volume" is also agreed beforehand, as an empirical measurement, as should acceptable thresholds for the ratio in amplitude between the ticks and the tone in the first 4 seconds.