The Echoes Beneath

Preliminary Assessment
Location: Catacombs - Sector Zero
Phantom Limb Index: Variable Perception
Core Findings: Initial contact reverberates with subtleties, akin to whispers on the nape—a delicate trace.

1. Spatial Orientation: Echoes perceived at variable amplitudes between {4.2, 6.8} decibels along corridor (-1, +3). Subdivision required. Ascertain passage via auditory resonance frequency.

2. Echo Cycle Integration: Observe harmonic shifts in quiet sectors. Document phases {(An, Bn), (n ∈ ℤ)} as needed. Temporal echoes may disrupt at harmonic resonance frequencies.

Further Observation Required
For additional parameters refer to antecedent comparisons or modulation patterns.

Addendum: It is hypothesized that the fluctuation in echoic response may correlate with unregistered thermal gradients. Such occurrences demand speculative analysis.
Investigators must maintain vigilance against auditory hallucinations, specifically those resembling obsolescent tonal memories.