« on: 07/10/2019 20:57:20 »
Thanks but I didn't say by human ear.
Ok, then I think the most sensitive detectors we have for vibrations are those that are looking for gravitational waves (LIGO and VIRGO), which can detect minuscule vibrations. (I can't find the numbers now, and gotta run--but I will say that they are the equivalent of using a seismometer to hear a mouse fart on the other side of the globe.)
Found it: One example is 1049 Watts at the source, but the source is 410 Mpc away, or 1.26x1025 meters away. (so not as faint as I thought...)
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