Sound Absorption Coefficient Tester Kit with Arduino Mega + LED
Hands-On Acoustics: Build a Sound Absorption Tester with Arduino Mega & OLED Logging
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn your engineering workbench into a materials testing lab. This kit lets you construct a dual-microphone system that captures incident and reflected sound pressure levels, then uses the Arduino Mega to calculate how much sound energy a material absorbs. Whether you’re analyzing foam panels for a college project or comparing building insulation samples, you’ll have a fully functional instrument that displays results on an OLED screen and logs data to microSD.
What You'll Build
You’ll assemble a complete sound absorption coefficient tester using two MAX9814 microphone amplifiers mounted at known positions along a tube (not included). The passive buzzer generates swept tones, the microphones capture the pressure waves, and the Arduino Mega 2560 computes the absorption coefficient based on the amplitude ratio. Real-time values appear on the 0.96-inch OLED, while the DS3231 RTC stamps each measurement. All data saves to a microSD card for further analysis.
What You'll Learn
- Implement dual-microphone signal processing to separate incident and reflected sound waves
- Calculate sound absorption coefficients using the transfer-function method
- Design and solder a compact instrument on prototype PCBs with proper noise filtering
- Log time-stamped acoustic data to SD and export for analysis in Python, Excel, or MATLAB
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| MAX9814 Mic Amp | 2 |
| Passive Buzzer | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 100nF Caps | 10 |
| 10kΩ Resistors | 5 |
| PCB Prototype Board | 2 |
| 9V Battery Snap | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
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 kit is designed for engineering undergraduates (B.Tech ECE/EEE) tackling acoustic projects, Smart India Hackathon teams developing noise monitoring solutions, and students at IITs, NITs, VIT, BITS Pilani who need a reliable measurement setup for material testing. It’s also ideal for CBSE Class 12 physics enthusiasts preparing for practical exams with a modern take on sound absorption.
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?
Every kit includes a QR code that links to an AI companion trained on this exact project. It can walk you through troubleshooting step-by-step, and our team is available on WhatsApp for additional support.
Can I measure absorption coefficients of everyday materials like foam and cardboard?
Yes, the dual-microphone setup works with a simple tube (not included) where you can place any flat sample. The kit’s firmware calculates the absorption coefficient directly from amplitude differences.
Does the kit include sample materials for testing?
No, it does not include materials, but you can test any acoustic panel, fabric, or building material you have access to. We provide a calibration procedure to ensure accurate results.
How do I export the data for analysis?
The MicroSD module saves timestamped CSV files. You can load these directly into Excel, MATLAB, or Python for graphing and further analysis.
MAX9814 mic measures reflected vs incident sound amplitude for different materials. Calculates absorption.
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.
Other projects you can build
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