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…
Microphone modules are compact units that integrate a microphone element with essential circuitry, such as decoupling capacitors, connectors or contact pads, into a single package. They simplify the integration of audio capture into devices by providing a ready-to-use solution. Commonly used in smartphones, voice assistants, and IoT devices, these modules offer ease of integration and consistent performance, accelerating product development and enhancing audio functionality.
| Image | Name | Description | Dimensions (LxW) [mm] | Microphone PN | Microphone Port | AOP [dB SPL 1%] | SNR [dB] | LFRO [Hz] |
|---|---|---|---|---|---|---|---|---|
| KFE-15 | Seltech Flex circuit extension for Syntiant Flex circuits for testing | 150x11.5 | - | - | - | - | - |
| ABY-SPH0655 | FPC with SPH0655LM4H-1 | 25x4.5 | SPH0655LM4H-1 | Bottom port | 130.5 | 70 | 25 |
| KAS-700-0145 | FPC with SPK0641HT4H-1 | 25x4.6 | SPK0641HT4H-1 | Top port | 120 | 64.5 | 35 |
| MIC211002 | Adhesive PCB with SPH0690LM4H-1 and JST S4B-PH-SM4B-TB connector | 18.35x14.3 | SPH0690LM4H-1 | Bottom port | 130 | 68.5 | 30 |
Microphone modules are compact units that integrate a microphone element with essential circuitry, such as decoupling capacitors, connectors or contact pads, into a single package. They simplify the integration of audio capture into devices by providing a ready-to-use solution. Commonly used in smartphones, voice assistants, and IoT devices, these modules offer ease of integration and consistent performance, accelerating product development and enhancing audio functionality.
| Image | Name | Description | Dimensions (LxW) [mm] | Microphone PN | Microphone Port | AOP [dB SPL 1%] | SNR [dB] | LFRO [Hz] |
|---|---|---|---|---|---|---|---|---|
|
| KFE-15 | Seltech Flex circuit extension for Syntiant Flex circuits for testing | 150x11.5 | - | - | - | - | - |
|
| ABY-SPH0655 | FPC with SPH0655LM4H-1 | 25x4.5 | SPH0655LM4H-1 | Bottom port | 130.5 | 70 | 25 |
|
| KAS-700-0145 | FPC with SPK0641HT4H-1 | 25x4.6 | SPK0641HT4H-1 | Top port | 120 | 64.5 | 35 |
|
| MIC211002 | Adhesive PCB with SPH0690LM4H-1 and JST S4B-PH-SM4B-TB connector | 18.35x14.3 | SPH0690LM4H-1 | Bottom port | 130 | 68.5 | 30 |
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…
Microphone modules are compact units that integrate a microphone element with essential circuitry, such as decoupling capacitors, connectors or contact pads, into a single package. They simplify the integration of audio capture into devices by providing a ready-to-use solution. Commonly used in smartphones, voice assistants, and IoT devices, these modules offer ease of integration and consistent performance, accelerating product development and enhancing audio functionality.
| Image | Name | Description | Dimensions (LxW) [mm] | Microphone PN | Microphone Port | AOP [dB SPL 1%] | SNR [dB] | LFRO [Hz] |
|---|---|---|---|---|---|---|---|---|
|
| KFE-15 | Seltech Flex circuit extension for Syntiant Flex circuits for testing | 150x11.5 | - | - | - | - | - |
|
| ABY-SPH0655 | FPC with SPH0655LM4H-1 | 25x4.5 | SPH0655LM4H-1 | Bottom port | 130.5 | 70 | 25 |
|
| KAS-700-0145 | FPC with SPK0641HT4H-1 | 25x4.6 | SPK0641HT4H-1 | Top port | 120 | 64.5 | 35 |
|
| MIC211002 | Adhesive PCB with SPH0690LM4H-1 and JST S4B-PH-SM4B-TB connector | 18.35x14.3 | SPH0690LM4H-1 | Bottom port | 130 | 68.5 | 30 |