AiHowse · NoiseForge
NoiseForge ANC System
Professional Near-Source Active Noise Control
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Real-time adaptive cancellation of air conditioner sine-wave noise at the source.
Signal Flow
Reference Microphone → Adaptive Processor (FxNLMS) → Structural Exciters
↑ Feedback from Error Microphone
Core Hardware (Fast Prototype)
- Teensy 4.1 + Audio Shield (Adaptive Processor)
- INMP441 Reference + Error Microphones
- MAX98357A Amplifier
- Dayton DAEX25 Structural Exciters
Status: Private Beta – Fast Prototype Available
System Overview (Real Components)
The current Fast Prototype uses the following real, purchasable parts:
- Teensy 4.1 + Audio Shield→ Adaptive Processor
- 2× INMP441 MEMS Microphones→ Reference + Error
- MAX98357A Amplifier→ Drives the exciters
- 2× Dayton DAEX25 Exciters→ Structural cancellation
How It Works
- 1
Monitor the Source
A reference microphone is placed near the compressor and continuously captures the exact sine-wave pattern.
- 2
Calculate the Counter-Wave
The Teensy 4.1 control unit analyzes the signal in real time and generates the precise opposite wave needed for cancellation.
- 3
Cancel at the Source
Dayton DAEX25 structural exciters mounted on the air conditioner vibrate in opposition to the noise, reducing vibration before it radiates as sound.
- 4
Measure & Improve
An error microphone monitors residual noise. The FxNLMS adaptive loop continuously improves the longer it runs.
Supporting Element
Modular Acoustic Panels
The system listens to the compressor, generates a precise opposing signal, applies it through structural exciters, and continuously improves based on the residual noise measured by the error microphone. Panels handle mid- and high-frequency content the active loop does not target.
Key Benefits
- Real-time adaptive cancellation of tonal noise
- Structural (near-source) actuation for higher effectiveness
- Continuous self-improvement over time
- Built from real, purchasable components
- Open firmware (FxNLMS) and expandable design
- Designed for measurable results
Expected Performance (Prototype Targets)
| Metric | Target |
|---|---|
| Dominant tonal peak reduction | 10–18 dB |
| Primary harmonics | 8–14 dB |
| Overall perceived noise reduction | Clearly noticeable |
| Continuous improvement | Yes |
Performance depends on correct placement and solid mechanical coupling of the exciters.
What's Included (First Customer Kit)
- Adaptive Control Unit (Teensy 4.1 path)
- Reference Microphone (INMP441)
- Error Microphone (INMP441)
- Structural Exciters (Dayton DAEX25)
- MAX98357A Amplifier
- Modular Acoustic Panels
- Mounting hardware and cables
- Pre-loaded adaptive firmware (FxNLMS)
- Private build documentation
- Direct beta support
Fast Prototype BOM (Buy Today)
Source these parts and start building the Fast Prototype today.
Build Resources
Purchase → Build → Test → Iterate
1. Purchase / Reserve
Claim the First Customer Kit and become Customer #0001 — or source the BOM yourself and build today.
2. Build
Wire Teensy 4.1 + Audio Shield, mics, MAX98357A, and DAEX25 exciters. Flash FxNLMS firmware.
3. Test
Use the testing checklist to measure tonal reduction on your air conditioner (phone spectrum app OK for prototype).
4. Iterate
Submit feedback and receive ongoing firmware improvements.
Claim First Customer Kit / Start Building
You can start building the Fast Prototype today using the parts above — or claim the first customer kit with private docs and support.
Kit option: $259 — become Customer #0001.
Status
Private Beta – Fast Prototype Available
Technical Summary
- AlgorithmFiltered-X Normalized LMS (FxNLMS)
- Primary MethodNear-source structural cancellation
- Target NoiseAir conditioner compressor sine waves and harmonics
- PlatformTeensy 4.1 + Audio Shield
- StatusPrivate Beta – Fast Prototype Available
Status: Private Beta – Fast Prototype Available
NoiseForge ANC System is a Fast Prototype you can build today with real, purchasable parts. The first kit unit is reserved for the founding customer so we can build, test, and iterate together in the real world.
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