Gravity Analog Sound Level Meter

This is an Arduino compatible sound level meter from DFRrobot (also known as a decibel meter or noise meter). It uses an electronic circuit and a low-noise microphone, allowing you to accurately measure the sound level of the environment. It can be used to check for environmental noise, such as monitoring highway noise, monitoring bedroom noise, etc. The meter is powered with 3.3 to 5 V DC and the signal is evaluated via the analog output, which generates a voltage between 0.6 to 2.6V for you. Thanks to the analog output signal, the meter can be operated with many microcontrollers. The decibel value is linear with the output voltage, resulting in a simple conversion without a complex algorithm. 

Note: The black film on the microphone is a sensitive component, do not touch it with fingernails or other sharp objects. Do not place this module on electrically conductive surfaces, otherwise the pins of the microphone will be shorted.

---

Recommended accessories:

• Gravity 16Bit 4-Channel ADC Analog Digital Converter I2C ADS1115

Features of Sound Level Meter:

• High precision due to built-in low-noise microphone
• Operating voltage 3.3 to 5.0V
• Compatible with 3.3V/5V microcontrollers such as Arduino, ESP32 or ESP8266
• Simple conversion due to linear analog output, 0.6 to 2.6V corresponds 30 to 130dBA

Documentation:

• DFRobot Wiki

Technical Details:

• Input voltage (VCC): 3.3V to 5.5V
• Input current: 22mA@3.3V, 14mA@5.0V
• Output voltage: 0.6 to 2.6V
• Measurement range: 30dBA to 130dBA
• Measurement error: ±1.5dB
• Frequency rated: A-rated
• Frequency range: 31.5Hz ~ 8.5KHz
• Time behavior: 125ms
• Dimension: 60 x 43 x 9mm
• Weight: 24g

Delivery includes:

• 1x Gravity analog sound level meter
• 1x Gravity 3Pin Analog Sensor Cable