Air
Postural Microseism Subtraction
Stand with feet hip-width, weight even. Find the amplitude at which the involuntary sway becomes louder than the voluntary one.
Full Lesson Notes
Complete Practice
Stand with feet hip-width, weight even. Without moving the feet, generate the smallest possible anterior-posterior sway — sub-centimeter, barely perceptible from outside. Now exaggerate the sway for ten seconds, return to stillness, and try to subtract the loud signal from your attention to listen for the residual hum underneath. Find the amplitude at which the involuntary sway becomes louder than the voluntary one. 15 additional collision ideas + 10 additional insights without collision, drawn from the remaining 455 ideas after Pass 1. Numbering continues from #26 across both passes so flags reference the combined pool of 50. ---
