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…
The Bluetooth Modules are designed for ultra-low-power wireless applications. They offer the lowest power consumption in the industry, enabling advanced features while optimizing size and battery life. With a dual-core architecture and 2.4 GHz transceiver, they support Bluetooth Low Energy and custom protocols. They facilitate rapid development with abstraction, drivers, and sample applications.
| Image | Name | Description | Diameter / length [mm] | Width [mm] | Thickness [mm] | Package | RF Protocol | Memory [MB] | Frenquency Band [MHz] | Digital Comm I/O | Min. operating Temp. [°C] | Max. operating Temp. [°C] | MSL level | Product status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NCH-RSL10-101Q48-ABG | Chipset RSL10 BLE RADIO QFN48 | 6 | 6.00 | 0.8 | QFN-48 | Bluetooth Low Energy | 384kB Flash memory | 2400-2480 | I²C. SPI. UART | -40 | 85 | 3 | Preferred |
| NCH-RSL10-101S51-ACG | Chipset RSL10 BLE RADIO SIP MODULE | 8 | 6.00 | 1.46 | SIP-51 | Bluetooth v5.0 | 384kB Flash memory | 2400-2480 | I²C. SPI. UART | -40 | 85 | 3 | Preferred |
| NCH-RSL10-101WC51-ABG | Chipset RSL10 BLE RADIO WLCSP51 | 6 | 2.33 | 0.35 | WLCSP-51 | Bluetooth v5.0 | 384kB Flash memory | 2400-2480 | I²C. SPI. UART | -40 | 85 | 1 | Preferred |
The Bluetooth Modules are designed for ultra-low-power wireless applications. They offer the lowest power consumption in the industry, enabling advanced features while optimizing size and battery life. With a dual-core architecture and 2.4 GHz transceiver, they support Bluetooth Low Energy and custom protocols. They facilitate rapid development with abstraction, drivers, and sample applications.
| Image | Name | Description | Diameter / length [mm] | Width [mm] | Thickness [mm] | Package | RF Protocol | Memory [MB] | Frenquency Band [MHz] | Digital Comm I/O | Min. operating Temp. [°C] | Max. operating Temp. [°C] | MSL level | Product status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| NCH-RSL10-101Q48-ABG | Chipset RSL10 BLE RADIO QFN48 | 6 | 6.00 | 0.8 | QFN-48 | Bluetooth Low Energy | 384kB Flash memory | 2400-2480 | I²C. SPI. UART | -40 | 85 | 3 | Preferred |
|
| NCH-RSL10-101S51-ACG | Chipset RSL10 BLE RADIO SIP MODULE | 8 | 6.00 | 1.46 | SIP-51 | Bluetooth v5.0 | 384kB Flash memory | 2400-2480 | I²C. SPI. UART | -40 | 85 | 3 | Preferred |
|
| NCH-RSL10-101WC51-ABG | Chipset RSL10 BLE RADIO WLCSP51 | 6 | 2.33 | 0.35 | WLCSP-51 | Bluetooth v5.0 | 384kB Flash memory | 2400-2480 | I²C. SPI. UART | -40 | 85 | 1 | Preferred |
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…
The Bluetooth Modules are designed for ultra-low-power wireless applications. They offer the lowest power consumption in the industry, enabling advanced features while optimizing size and battery life. With a dual-core architecture and 2.4 GHz transceiver, they support Bluetooth Low Energy and custom protocols. They facilitate rapid development with abstraction, drivers, and sample applications.
| Image | Name | Description | Diameter / length [mm] | Width [mm] | Thickness [mm] | Package | RF Protocol | Memory [MB] | Frenquency Band [MHz] | Digital Comm I/O | Min. operating Temp. [°C] | Max. operating Temp. [°C] | MSL level | Product status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| NCH-RSL10-101Q48-ABG | Chipset RSL10 BLE RADIO QFN48 | 6 | 6.00 | 0.8 | QFN-48 | Bluetooth Low Energy | 384kB Flash memory | 2400-2480 | I²C. SPI. UART | -40 | 85 | 3 | Preferred |
|
| NCH-RSL10-101S51-ACG | Chipset RSL10 BLE RADIO SIP MODULE | 8 | 6.00 | 1.46 | SIP-51 | Bluetooth v5.0 | 384kB Flash memory | 2400-2480 | I²C. SPI. UART | -40 | 85 | 3 | Preferred |
|
| NCH-RSL10-101WC51-ABG | Chipset RSL10 BLE RADIO WLCSP51 | 6 | 2.33 | 0.35 | WLCSP-51 | Bluetooth v5.0 | 384kB Flash memory | 2400-2480 | I²C. SPI. UART | -40 | 85 | 1 | Preferred |