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Description: 1. The M5Stack PDM Microphone Unit (SPM1423) is a compact microphone module designed for the M5Stack IoT development platform. It enables real-time voice input and speech recognition applications. 2. PDM Microphone: This module features a high-performance PDM microphone that offers improved sound quality compared to traditional analog microphones. It has a sensitivity of -38dB, making it suitable for various audio recording applications. 3. Connectivity: The M5Stack SPM1423 can be easily connected to the M5Stack base board via its dedicated I2S interface pins (WS, SD, SCK). No external power or ground connections are required. 4. Integration with M5Stack: The module integrates seamlessly with the M5Stack programming environment (MicroPython, Arduino, etc.). Users can access and control the microphone via the respective libraries available for each platform. 5. Voice Recognition: With the help of popular speech recognition APIs or services like Google Speech API, Microsoft Azure Co
| Specification | Details |
|---|---|
| Model Number | SPM1423 |
| Interface | I2S SPI and UART |
| Microphone Type | Digital PDM Microphone |
| Sampling Rate | Up to 48 kHz |
| Signal-to-Noise Ratio (SNR) | 50 dB |
| Sensitivity | -36 dBV |
| Frequency Response | 20 Hz to 18 kHz |
| Power Consumption | Typically around 5 mA |
| Operating Voltage | 3.3V and 1.8V |
| Dimensions | 25mm x 15mm x 5mm |
| Weight | 6 grams |
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