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V2X Acoustic Intelligence Platform

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SirenSense detects emergency vehicle sirens using Edge AI and a 4-microphone array — then tells you exactly where they're coming from. No internet. No subscription. Always on.

See the Products How It Works

The Problem

You Can't Tell Where It's Coming From

In dense urban environments, siren sound bounces off buildings in every direction. Inside a car with AC or music, you may not hear it at all. When you finally react — it may already be too late.

+37% of drivers don't detect an ambulance until they see it

+4 min average delay caused by urban blockages

~1,800 total traffic-related deaths per year in Spain

SirenSense acoustic sensor dome prototype

Roof Mounted · IP67

How It Works

Three Layers of Protection

Acoustic Detection

Four INMP441 MEMS microphones in a cross-array capture sound from every direction simultaneously. An Edge AI CNN (trained on Edge Impulse) classifies siren audio in under 50ms.

Direction Calculation

GCC-PHAT algorithm with 8× sub-sample interpolation calculates the Time Difference of Arrival between microphone pairs, resolving the siren direction to 0.29° accuracy.

Driver Alert

A directional arrow on the cabin display shows exactly where to yield — updated 10× per second. LoRa RF beacon reception gives up to 60 seconds of advance warning from Transponder-equipped vehicles.

Products

Two Devices. One Ecosystem.

100% offline. No internet. No Servers. Works from the moment it's powered.

SirenSense Copilot PRO — in-car display showing emergency vehicle alert

In-Car Display — Copilot

SirenSense Copilot PRO back view with suction mount

Suction Mount + Speaker

Roof Sensor Unit

📹

Dashcam

💥

Accident Detection

🫁

CO₂ Fatigue Detection

👶

Child in Car Alert

📡

Roof Unit

🚑

Audible & Silent Ambulance Detection

⚠️

Pre-Collision Alert

🔺

V16 Emergency Beacon

🆘

SOS Emergency Button

and much more!

For Every Driver

Copilot PRO

The in-car display mounts to your windshield. The acoustic sensor dome sits on your roof like a GPS antenna. Together, they detect and localise sirens autonomously — even with windows up and music on.

4× INMP441 MEMS microphones — 190mm baseline

Edge AI CNN — 90% validation accuracy

GCC-PHAT TDOA — 0.29° angular resolution

ESP32-S3, 16MB Flash, 8MB PSRAM

LoRa SX1278 433MHz — 2km beacon range

LiFePO4 battery + USB-C charging

V16 digital emergency beacon mode

^€79

For Emergency Vehicles

Transponder

Installed in ambulances, fire engines, and police vehicles. Continuously broadcasts an encrypted RF beacon carrying vehicle ID, GPS position, and timestamp to all nearby Copilots.

LoRa SX1278 433MHz, AES-128 encrypted

BN-880 GPS, 10Hz update rate

ALOHA protocol — multi-vehicle collision avoidance

1–2km range in urban environments

30–60 seconds advance warning to drivers

12V vehicle supply, zero maintenance

^€120 B2B

Engineering

Built From Scratch.

Every PCB designed in KiCad. Custom FPC footprints. Dual I2S synchronisation solved at hardware level with boot-time loopback calibration. Temperature-corrected speed of sound on every frame.

MCU ESP32-S3 240MHz dual-core

Sample Rate 44,100 Hz 32-bit stereo × 2 buses

TDOA Resolution 0.29° with 8× sub-sample interpolation

CNN Inference <50ms on-device, no cloud

Mic Baseline 190mm N-S and E-W axes

PCBs 5 custom boards · ENIG · JLCPCB

Firmware ESP-IDF v5.0+ · FreeRTOS

Enclosure PETG · UV-stabilised · IP67

Main PCB

90×90mm · ENIG · ESP32-S3 + power + FPC

Mic PCB ×4

14×14mm · 1.0mm · INMP441 MEMS

BMS PCB

Battery management · LiFePO4 charge + protect

Platform

One Hardware.
Many Applications.

The same ESP32-S3 node with its 4-mic acoustic array runs any application with a firmware update. The hardware is fixed. The use case is software.

Road Safety

Siren detection + TDOA direction. Base product.

No hardware change

Gunshot Detection

ShotSpotter alternative at <€2,000/km² vs €95,000/km²/year.

CNN retrain only

Counter-Drone

Detects drone rotor blade frequencies at 200–500m. 3D triangulation.

CNN retrain only

Industrial Safety

Machinery approach detection. Predictive maintenance via acoustic signature.

IP67 casing only

Contact

Let's Talk.

Interested in the Copilot, the Transponder, or the platform technology? Whether you're a driver, a fleet operator, or a city council — reach out.

abughazalaibrahim@gmail.com

Submitted to

21st Entrepreneurship Ideas Competition · University of Seville · STCE / Santander X

Hear What You Can't.