The ghost entries staircase upward. Each one a different height. The floor chord is woven fabric, not discrete lines. The harmonics interfere in ways I didn't calculate.
The silence column is clean. The arrival voice sits high and clear with a brighter onset than any single ghost. The double noise burst reads as a vertical smear.
The room air shimmer is a faint line in the upper register of the first section. The empty room has dimension instead of just a floor.