PROJECT TOPICSecurity, Defense & Emergency Response
Perimeter Acoustic Triangulation Node
An acoustic security telemetry concept investigating tetrahedral microphone arrays, digital signal processing cross-correlation, and LoRa mesh networks to triangulate footsteps, fence cutting, and vehicular intrusion.
Non-Line-of-Sight Acoustic Event Detection
- ✓Detects perimeter breaches through thick vegetation where security cameras are completely blinded.
- ✓Calculates azimuth and elevation angles to acoustic impulses using microsecond time-difference math.
- ✓Operates for months on miniature lithium cells using wake-on-acoustic threshold hardware.
The Engineering Challenge
Problem / Objective
Optical cameras are blinded by thick fog, heavy rain, or dense tree canopies along remote facility property boundaries.
Conceptual Signal Flow
System Concept
Tetrahedral Microphones → Cross-Correlation DSP → TDOA Bearing Vector → Multi-Node Triangulated Location.
Architecture Modules
1Tetrahedral Calibrated Microphone Pod
2Low-Power Digital Signal Processor (DSP)
3LoRa Long-Range Mesh Transmitter
4Central Tactical Map Triangulation Engine
Hardware Categories
Low-Noise MEMS MicrophonesCortex-M4 DSP MCULoRa TransceiverConformal Coated Enclosure
Technologies & Software
Acoustic TDOADSP Cross-CorrelationMesh NetworkingPerimeter SecurityCross-Correlation Beamforming MathMulti-Node Hyperbolic Solver
Engineering Considerations & Edge Cases
- Wind noise saturation on outdoor exposed microphone membranes
- Temperature-dependent variations in the speed of sound through ambient air
Applications
Remote pipeline right-of-way monitoring
Substation security fencing
Forestry conservation boundary tracking
Engineering Inquiry & Collaboration
Interested in Developing this Architecture?
Connect directly with Tamizh Tech engineers in Coimbatore to discuss mechanical fabrication, sensor selection, firmware implementation, or turnkey system commissioning.