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Grove-Loudness Sensor-Based on amplifier LM2904&built-in microphone
The Grove-Loudness Sensor is based on amplifier LM2904 and a built-in microphone and is designed to detect the loudness of environmental sound.
Features- Upgraded functionality: Based on LM2904 -- Dual, 36-V, 1.2-MHz operational amplifier with -40°C to 125°C operation
- Wide supply voltage range: In the range of 3.2V~5.2V
- Built-in signal filtering: Input signal will go through two times filtering inside the module
- Adjustable output gain: A screw potentiometer that enables manual adjustments to the output gain
- Grove unified socket: The product ensures "Plug and Play" and could be versatile for various applications of Grove
The Grove-Loudness Sensor is designed to detect the loudness of environmental sound. Based on amplifier LM2904 and a built-in microphone, it amplifies and filters the high-frequency signal that is received from the microphone and outputs a positive envelope. This will make for Arduino's signal acquisition. The output value depends on the level of the sound input. In order to avoid unnecessary signal disturbances, the input signal will go through two times filtering inside the module. Lastly, there is a screw potentiometer that enables manual adjustments to the output gain.
What is Grove？ We have developed more than 400 Grove modules, covering a wide range of applications that can fulfil various needs. Click to explore the Grove Sensor family and get started to Grove your Idea. For all Grove users (especially beginners), we provide you with guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your use of the product.Comparisons
| Details | Grove - Sound Sensor (LM358) | Grove-Loudness Sensor-Based on amplifier LM2904&built-in microphone | Grove - Analog Microphone (MEMS) |
|---|---|---|---|
| Image | |||
| Microphone | Electret Condenser Microphone | Electret Condenser Microphone | SiSonic MEMS Microphone |
| Price | $4.90 | $5.9 | $6.90 |
| Voltage Range | 4V - 12V | 3.5V - 10V | 1.5V - 3.6V |
| Operating Current | 4mA - 5mA | / | 5mA |
| Sensitivity | -60~-56dBV/Pa | -60~-56dBV/Pa | -25~-19dBV/Pa |
| Size of Microphone | Medium | Medium | Small |
| Amplifier | LM358 | LM2904 | MEMS |
| Quality of Microphone |
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Specification| Dimensions | 24mm x20mm x9.8mm |
| Weight | G.W 9g |
| Battery | Exclude |
| Voltage | 3.5~10 VDC |
| Working Frequency | 50~2000 Hz |
| Sensitivity | -48~66 dB |
| Signal-to-noise Ratio | >58 dB |
| Output Signal range | Analog Signal (0-1023) |
| Grove - Loudness Sensor | 1 |