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Gravity: Analog Sound Level Sensor

SKU: SEN0232

Gravity: Analog Sound Level Sensor utilizes professional instrument-grade measurement circuitry to deliver high-precision noise monitoring. It features a wide range of 30–130 dBA with a minimal error of ±1.5 dB. With a weighted frequency response of 31.5 Hz to 8.5 kHz and a 125 ms time constant, it ensures reliable data capture. This compact module outputs an easy-to-use 0.6–2.6 V analog signal compatible with most development boards.

Front of a small electronic board with sound level meter and decibel meter components.-DFRobot product sku:SEN0232 image.

Downloadable Resources

  • Docs
  • Tech Specs

    • Specification

    Parameter Value
    Measuring Range 30dBA ~ 130dBA
    Measurement Error ±1.5dB
    Frequency Weighted A Weighted
    Frequency Response 31.5Hz ~ 8.5KHz
    Time Characteristics 125ms
    Input Voltage 3.3 ~ 5.0V
    Input Current [email protected], [email protected]
    Output Voltage 0.6 ~ 2.6V
    Module Size 60mm * 43mm

    Pinout

    Gravity_Sound_Level_Sensor_Pinout

    Num Label Description
    1 A Analog Signal Output(0.6~2.6V)
    2 + Power VCC(3.3~5.0V)
    3 - Power GND(0V)

    FAQ

    • SEN0232, What is the operating temperature specification?

      The microphone of this product is capacitive. And this product has been calibrated at 94dB@1KHz before sale.

    • Although the environment is very quiet, but the decibel value is not less than 30dbA. Why?
      In our living environment, there is always a little sound . Human's ear is hard to hear the sound below 30dBA, but the equipment still can detect the sound. So it is difficult for the sound level to be less than 30dBA in our living environment.
    • Why is the decibel value unstable, and constantly varying? Is this normal?
      The decibel value measured by the sound level meter is the sound level of a short period of time (about hundreds of milliseconds), so the value is a instantaneous value. The sound level meter is measuring constantly, and at different times the sound is varing, so the decibel should be varing . This is normal.

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