ZIAA ARCHIVE RECORDPROTOTYPES
PROT-040prototypeVERIFIED RECORD
Modulated Plasma Arc Loudspeaker with Wideband Ultrasonic Response (Revision 2.1)
PROT-040: PLASMA-ARC-V2CLEARANCE: BLACK-BOXSTATUS: CONTAINED HAZARDYEAR: 2024
Modulated Plasma Arc Loudspeaker with Wideband Ultrasonic Response (Revision 2.1)
Discipline: Experimental Audio Systems · Lead Researcher: Isolde Chen
OPERATIONAL ABSTRACT
A mass-less acoustic loudspeaker that directly ionizes ambient air using a high-voltage electrical arc, reproducing transient sound with zero mechanical inertia up to 60 kHz. Enhanced revision 2 with improved low-noise shielding and updated real-time firmware.
TECHNICAL SUMMARY & TRANSDUCTION DYNAMICS
A 30 kHz switching flyback transformer produces a continuous electrical discharge. Audio signals modulate arc temperature and current, producing acoustic pressure waves directly in air. Calibrated for studio and field use under ZIAA experimental protocols. Harmonic distortion measured under 0.02% across primary operating range.
ENGINEERING SPECIFICATIONS
DIMENSIONS
600 × 315 × 175 mm
OPERATIONAL BANDWIDTH
30 Hz – 58 kHz
POWER CONSUMPTION
39 W (PoE+ Gigabit Ethernet)
SIGNAL-TO-NOISE
115 dB (A-Weighted @ 1 kHz)
PRIMARY TRANSDUCER
Tungsten electrode pair producing modulated high-voltage atmospheric plasma
COMPUTATIONAL CORE / DSP
Optically isolated PWM drive stage with high-speed analog gate drivers
VECTOR TECHNICAL SCHEMATIC // BLUEPRINT
FIG 5.1 // GEOLOGICAL BOREHOLE STRATA & GEOPHONE TOPOLOGY
FACILITY: PLASMA-ARC-V2PLAYABLE PROTOTYPE ACOUSTIC EMISSION BENCH
ZIAA ACOUSTIC SYNTHESIS TEST BENCH // V4.1STANDBY
PLASMA-ARC-V2 // CALIBRATION PROFILE
CH-A TIME-DOMAIN OSCILLOSCOPE (1024-PT)STEREO BINAURAL
CH-B 64-BAND SPECTRAL OCTAVE DECOMPOSITION20 Hz – 20 kHz
CARRIER192.5 Hz
FM RATE13.3 Hz
BINAURAL Δ±5.0 Hz
CUTOFF5220 Hz
RESONANCE Q11.0
CAVITATION17%
WAVE:
FILTER:
35%
BILL OF MATERIALS (BOM) & COMPONENT TOLERANCES
| Component | Supplier | Part No. | Tolerance |
|---|---|---|---|
| Precision Audio Transducer Assembly | ZIAA Precision Machining Shop | ZIAA-TX-139 | ±0.02 mm |
| Ultra-Low-Noise Operational Amplifiers | Texas Instruments / Burr-Brown | OPA1612A-SOIC8 | 0.000015% THD+N |
| Embedded DSP Microcontroller Core | PJRC / STMicroelectronics | STM32H743VIT6 480MHz | 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-209 | 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.