Smart Hearing Aid Signal Processor Kit with ESP32
Speak Clearly Again: ESP32 Smart Hearing Aid Signal Processor Kit
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
This kit lets you build a wearable device that captures sound through a high-quality INMP441 I2S microphone, processes it in real time on an ESP32 to amplify speech frequencies between 300 Hz and 3 kHz while suppressing background noise, and delivers clear audio through a PAM8403 amplifier and 3.5mm earphone jack. By implementing a digital bandpass filter and driving the MCP4725 DAC, you’ll explore the fundamentals of digital signal processing in an embedded context. For students and hobbyists exploring assistive technology, this project demonstrates embedded audio processing for real-world health applications.
What You'll Build
You'll assemble a self-contained, battery-powered hearing aid signal processor that filters incoming audio in real time, emphasizing the speech band. The device includes a user-replaceable 3.7V LiPo battery, a charging module, and a standard 3.5mm audio output for monitoring. By the end of the 6-8 hour build, you’ll have a working prototype you can wear to test speech intelligibility in noisy environments—an ideal demonstration of wearable health electronics.
What You'll Learn
- Real-time audio capture and I2S protocol on ESP32
- Digital bandpass filter design for speech enhancement
- Interfacing MEMS microphones and DACs for audio output
- Embedded power management with LiPo charging circuitry
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | x1 |
| INMP441 I2S Mic | x1 |
| MCP4725 DAC | x1 |
| PAM8403 Amp | x1 |
| 3.5mm TRS Jack | x1 |
| 10kΩ Resistors | x5 |
| 100nF Caps | x10 |
| PCB Prototype Board | x2 |
| 3.7V LiPo 500mAh | x1 |
| TP4056 Module | x1 |
| Enclosure Box | x1 |
| Soldering Iron | x1 |
| Solder Wire | x1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This advanced kit is designed for B.Tech ECE/EEE students undertaking DSP or biomedical projects, participants of Smart India Hackathon building assistive tech prototypes, and hobbyists at IIT/NIT/VIT/BITS who want hands-on experience with real-time embedded audio processing. It’s also suitable for ATL lab mentors guiding innovative health-tech projects and final-year students working on signal processing applications.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Open the QR code on the box to access the AI companion trained on this kit; it understands every component and step. If you need human backup, our WhatsApp support responds within 24 hours.
Is programming experience required?
Yes, you will write and flash Arduino code to the ESP32, but the AI companion provides a complete code walkthrough. You'll learn I2S configuration and filter design from scratch.
Can this device be used as an actual hearing aid?
No, this is an educational prototype. It demonstrates real-time DSP principles but is not a certified medical device.
Does the kit include a pre-soldered PCB?
No, you'll solder the components onto the prototype board using the included soldering iron and wire. This builds hands-on assembly skills.
INMP441 I2S mic + ESP32 applies real-time bandpass filter and amplification tuned to speech frequency band.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items