Space/Science — HabitableZone

Space/Science » in reply to Let me understand you correctly.

Gravity waves vs. acoustic waves

Daniel (and others), please correct me if I misinterpret

Gravity waves are a fluctuation in spacetime. The theory behind LIGO and other Michelson-type interferometers is that, under the influence of gravity waves, the length of each detector arm (two, at right-angles to each other) will change differently, relative to the angle of incidence of the wave, resulting in a change of the calibrated laser interference pattern in the detector assembly. They are built as long as budget allows to magnify the difference, and thus, their sensitivity.

Ears evolved to detect external differential compression of air, relative to an internal standard. A transient change in the "compression" of spacetime simultaneously effects everything nearby: the ear, the portion of the brain processing the signal, the internal and external air pressure, et cetera -- with the result that there is no local differential to detect.

That discounts the ultra-weak amplitude of the signal.

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