ZIAA ARCHIVE RECORDPROTOTYPES

PROT-025prototypeVERIFIED RECORD

Non-Contact Laser Profilometer for Historical Grooved Audio Carriers

PROT-025: OPTICAL-SCANNERCLEARANCE: BLACK-BOXSTATUS: CONTAINED HAZARDYEAR: 2021

Discipline: Signal Archaeology · Lead Researcher: Mireille O’Connor

OPERATIONAL ABSTRACT

An optical audio scanner utilizing dual 405nm blue lasers to reconstruct high-fidelity audio from fragile historical lacquer, wax, and metal phonograph discs.

TECHNICAL SUMMARY & TRANSDUCTION DYNAMICS

Laser triangulation and high-speed linear CMOS sensors capture groove wall topography at sub-micron resolution, converting physical groove excursions directly into 192 kHz audio. Calibrated for studio and field use under ZIAA experimental protocols. Harmonic distortion measured under 0.02% across primary operating range.

ENGINEERING SPECIFICATIONS

DIMENSIONS

320 × 210 × 175 mm

OPERATIONAL BANDWIDTH

30 Hz – 38 kHz

POWER CONSUMPTION

39 W (12V DC Linear Supply)

SIGNAL-TO-NOISE

114 dB (A-Weighted @ 1 kHz)

PRIMARY TRANSDUCER

405nm semiconductor laser diodes with high-magnification telecentric optics

COMPUTATIONAL CORE / DSP

FPGA image processing pipeline streaming RAW camera frames over USB3

VECTOR TECHNICAL SCHEMATIC // BLUEPRINT

FIG 5.1 // GEOLOGICAL BOREHOLE STRATA & GEOPHONE TOPOLOGY

FACILITY: OPTICAL-SCANNER

PLAYABLE PROTOTYPE ACOUSTIC EMISSION BENCH

ZIAA ACOUSTIC SYNTHESIS TEST BENCH // V4.1STANDBY

LOAD PROTOTYPE PRESET:

OPTICAL-SCANNER // CALIBRATION PROFILE

CH-A TIME-DOMAIN OSCILLOSCOPE (1024-PT)STEREO BINAURAL

CH-B 64-BAND SPECTRAL OCTAVE DECOMPOSITION20 Hz – 20 kHz

CARRIER110.0 Hz

FM RATE7.3 Hz

BINAURAL Δ±1.5 Hz

CUTOFF2200 Hz

RESONANCE Q6.0

CAVITATION8%

WAVE:

FILTER:

35%

BILL OF MATERIALS (BOM) & COMPONENT TOLERANCES

Component	Supplier	Part No.	Tolerance
Precision Audio Transducer Assembly	ZIAA Precision Machining Shop	ZIAA-TX-124	±0.02 mm
Ultra-Low-Noise Operational Amplifiers	Texas Instruments / Burr-Brown	OPA1612A-SOIC8	0.000015% THD+N
Embedded DSP Microcontroller Core	PJRC / STMicroelectronics	Teensy 4.1 ARM Cortex-M7	Industrial -40C to +85C
Conductive Plastic Continuous Potentiometers	Bourns Electronics	3852A-282-103AL	±10% Linear
Machined Anodized Aluminum Enclosure	ZIAA Mechanical Prototyping Bench	ENC-AL-224	MIL-A-8625 Type II

BENCH & FIELD OPERATION NOTES

High acoustic output capability: monitor SPL levels during resonant feedback experiments.
Precision optical components: protect lenses from direct dust and moisture during field deployment.

SPECULATIVE PATENTS:PAT-2021-025

TELEMETRY LOGS:LOG-049 LOG-050

FIELD SITES:Studio A (Anechoic Chamber & Spatial Stage)