How to estimate SPL from a microphone output ?
14 October 2025
When developing audio devices involving microphones, knowing the actual Sound Pressure Level (SPL) hitting your sensor is crucial. It…
When developing audio devices involving microphones, knowing the actual Sound Pressure Level (SPL) hitting your sensor is crucial. It…
AISonic™ SmartMics are low-power, intelligent microphones from Syntiant that are adaptable across various form factors in mobile devices, true wireless stereo (TWS) earbuds, and IoT applications. They enhance audio processing and understanding while maintaining a compact size. By handling data processing at the edge, these SmartMics offer wake-on-voice capabilities with reduced power consumption and increased privacy, all without compromising performance.
| Image | Name | Diameter / length [mm] | Width [mm] | Thickness [mm] | Port location | Output format | Sensitivity @ 1kHz [dBV re. 1V/Pa] or dBFs | Sensitivity Tolerance [± dB] | SNR [dB] | AOP [dB] | Nominal Voltage [V] | Memory [MB] | Digital Audio I/O | Digital Comm I/O | Product status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| IA610 | 3.5 | 2.65 | 0.98 | Bottom | Digital | -37 | 1 | 65.5 | 132.5 | 1.8 | 0.248 | 1x PDM in, 2x PDM out, 1x I2S/TDM (4ch in/out) | 1x I²C, 1x SPI, 1x UART, 1x GPIO w/interrupt | Preferred |
| IA611 | 4 | 3 | 1.3 | Top | Digital | -37 | 1 | 65.5 | 132.5 | 1.8 | 0.248 | 1x PDM in, 2x PDM out, 1x I2S/TDM (4ch in/out) | 1x I²C, 1x SPI, 1x UART, 1x GPIO w/interrupt | EOL |
AISonic™ SmartMics are low-power, intelligent microphones from Syntiant that are adaptable across various form factors in mobile devices, true wireless stereo (TWS) earbuds, and IoT applications. They enhance audio processing and understanding while maintaining a compact size. By handling data processing at the edge, these SmartMics offer wake-on-voice capabilities with reduced power consumption and increased privacy, all without compromising performance.
| Image | Name | Diameter / length [mm] | Width [mm] | Thickness [mm] | Port location | Output format | Sensitivity @ 1kHz [dBV re. 1V/Pa] or dBFs | Sensitivity Tolerance [± dB] | SNR [dB] | AOP [dB] | Nominal Voltage [V] | Memory [MB] | Digital Audio I/O | Digital Comm I/O | Product status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| IA610 | 3.5 | 2.65 | 0.98 | Bottom | Digital | -37 | 1 | 65.5 | 132.5 | 1.8 | 0.248 | 1x PDM in, 2x PDM out, 1x I2S/TDM (4ch in/out) | 1x I²C, 1x SPI, 1x UART, 1x GPIO w/interrupt | Preferred |
|
| IA611 | 4 | 3 | 1.3 | Top | Digital | -37 | 1 | 65.5 | 132.5 | 1.8 | 0.248 | 1x PDM in, 2x PDM out, 1x I2S/TDM (4ch in/out) | 1x I²C, 1x SPI, 1x UART, 1x GPIO w/interrupt | EOL |
When developing audio devices involving microphones, knowing the actual Sound Pressure Level (SPL) hitting your sensor is crucial. It…
When developing audio devices involving microphones, knowing the actual Sound Pressure Level (SPL) hitting your sensor is crucial. It…
AISonic™ SmartMics are low-power, intelligent microphones from Syntiant that are adaptable across various form factors in mobile devices, true wireless stereo (TWS) earbuds, and IoT applications. They enhance audio processing and understanding while maintaining a compact size. By handling data processing at the edge, these SmartMics offer wake-on-voice capabilities with reduced power consumption and increased privacy, all without compromising performance.
| Image | Name | Diameter / length [mm] | Width [mm] | Thickness [mm] | Port location | Output format | Sensitivity @ 1kHz [dBV re. 1V/Pa] or dBFs | Sensitivity Tolerance [± dB] | SNR [dB] | AOP [dB] | Nominal Voltage [V] | Memory [MB] | Digital Audio I/O | Digital Comm I/O | Product status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| IA610 | 3.5 | 2.65 | 0.98 | Bottom | Digital | -37 | 1 | 65.5 | 132.5 | 1.8 | 0.248 | 1x PDM in, 2x PDM out, 1x I2S/TDM (4ch in/out) | 1x I²C, 1x SPI, 1x UART, 1x GPIO w/interrupt | Preferred |
|
| IA611 | 4 | 3 | 1.3 | Top | Digital | -37 | 1 | 65.5 | 132.5 | 1.8 | 0.248 | 1x PDM in, 2x PDM out, 1x I2S/TDM (4ch in/out) | 1x I²C, 1x SPI, 1x UART, 1x GPIO w/interrupt | EOL |