Andy Evans wrote:

Apart from the fact that I can hear it. There's no assurance that you have any
technical knowledge that can explain it. I don't mind the fact that you can't
explain it - our knowledge always has limitations.

Your ear is a transducer - pressure to electrical impulses.

we have mics available that can hear stuff humans cant (demonstrably -
animals can hear the difference in the recordings where humans cant)

therefore the tool to measure your claimed effect is available.

either prove it or **** off.