PSYCHOACOUSTIC RETRIEVAL · HUMAN AUDITORY ZERO (0, 0, 0)

Human Hearing Corpus 3D

Centered on human auditory perception: 1 kHz speech core (X), neutral pink tilt (Y), and the 200 ms integration window (Z). Watch frequency and time project directly onto the floating acoustic walls.

THIRI PSYCHOACOUSTIC WORKBENCH (0, 0, 0) = 1 kHz · PINK NOISE · 200 ms
MCP CORPUS BRIDGE Connect AI agents via Model Context Protocol • search_corpus • render_csound_wav:
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PSYCHOACOUSTIC REFERENCE (0, 0, 0)
X: Pitch (Sub-bass ← 1 kHz → Air)
Y: Timbre (Dark ← Pink Tilt → Sizzle)
Z: Envelope (Haas Click ← 200ms → Drone)
Rear Wall: Frequency Spectrum (FFT Peaks vs. 1 kHz)
Floor Grid: Time Envelope Waveform (0 to 1,500 ms)
Orbital Ring: Live 3D Audio Probe Waveform
Sample Name
Category
X: 0.00 | Y: 0.00 | Z: 0.00
THIRI Harmonic Slices MCP INJECTION
Category Filter
Node Inspector
Click any point in 3D
Select a sound
Freq Rel 1k
0.00
Tilt Rel Pink
0.00
Time Rel 200m
0.00
Detected Key:-
Sample Duration:-
Relative Path: -
Agent Telemetry MCP QUERY
PROTOCOL: THIRI-MCP READY
// Select a node or trigger a THIRI preset

Psychoacoustics & ISO 226

Why the Center of Each Axis Represents Human Hearing

Human hearing is not a flat linear sensor starting from zero Hz or zero milliseconds. The ear is an evolved acoustic transducer with a resting equilibrium point.

01 · 1 kHz CENTER (PITCH)

Under ISO 226 equal-loudness contours, 1 kHz at 40 dB SPL defines 1 phon (the perceptual loudness baseline). The human ear canal resonates naturally between 1 kHz and 3.5 kHz for speech intelligibility. Sound to the left drops into tactile sub-pressure; sound to the right rises into sparkling air.

02 · PINK NOISE CENTER (TIMBRE)

Pink noise (-3 dB/octave, 1/f energy falloff) is perceived by human hearing as flat, neutral, and octave-balanced. Centering the Y-axis at pink noise means zero represents natural acoustic balance, negative Y represents dark, rolled-off warmth; positive Y represents bright, high-frequency excitement.

03 · 200 ms CENTER (ENVELOPE)

The human brain integrates energy over a ~200 ms window to assess steady loudness and syllable meter. Events below 30–50 ms fall under the Haas precedence limit and are perceived as instant transient impulses; events past 200 ms are recognized as continuous acoustic streams.