Overview
The Enviro Testers Sound Level Meter Module provides precise 30–130 dBA noise measurement with A-weighted response for environmental detection.
It features instrument-level circuitry, a low-noise microphone, and strong Arduino compatibility.
Supporting 3.3–5.0V wide voltage input and linear analog output, it ensures easy integration without complex algorithms.
Ideal for highway monitoring, indoor noise testing, and DIY environmental sound detection systems.
Features
- Wide Measuring Range: Accurately detects sound levels from 30 dBA to 130 dBA.
- High Accuracy: ±1.5 dB precision with A-weighted frequency response (simulating the human ear).
- Fast Response: 125 ms time characteristics for real-time sound monitoring.
- Arduino Compatible: Simple plug-and-play module, no welding or complex setup required.
- Linear Analog Output: Output voltage (0.6V–2.6V) directly correlates with decibel value for easy integration.
- Low Power Consumption: Operates at 22 mA (3.3V) or 14 mA (5.0V), suitable for embedded projects.
- Durable Build: Made with instrument-level circuit solutions and a low-noise microphone for reliable performance.
- Compact Size: Small board design (60.1 mm × 42.6 mm / 2.37 in × 1.68 in) for easy installation.
- Versatile Applications: Ideal for environmental noise detection, DIY monitoring systems, classrooms, offices, and road noise measurement.
Technical Specifications
| Frequency Response | 31.5 Hz ~ 8.5 kHz |
| Frequency Weighting | A-weighted (simulates human ear response) |
| Measuring Range | 30 dBA ~ 130 dBA |
| Measurement Error | ±1.5 dB |
| Resolution | 0.1 dB (standard output resolution) |
| Time Characteristics | 125 ms (fast response) |
| Input Voltage | 3.3V ~ 5.0V DC |
| Input Current | 22 mA @ 3.3V / 14 mA @ 5.0V |
| Output Voltage | 0.6V ~ 2.6V (linear analog output proportional to dB level) |
| Amplifier Type | Standard, instrument-level circuit |
| Power Consumption | Low-power design, <0.12W |
| Material | High-grade PCB with low-noise microphone |
| Board Size | 60.1 mm × 42.6 mm (2.37 in × 1.68 in) |
| Mounting Type | Standard mounting / DIY integration |
| Application | Environmental noise detection, DIY noise monitoring, Arduino/Raspberry Pi projects |
| Packaging | Standard protective packaging |
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