DFRobot Gravity: Analog Sound Level Meter


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Approx Restocking Date: 25 to 30 Days
SKU: 1141618
  1. Measuring Range: 30dBA ~ 130dBA
  2. Measurement Error: ±1.5dB
  3. Frequency Weighted: A Weighted
  4. Frequency Response: 31.5Hz ~ 8.5KHz


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Brand: DF Robot
Category: Sound Sensor
Tags: Sound Sensor

This is DFRobot Gravity: Analog Sound Level Meter.

DFrobot offers an advanced level of sensors at an affordable cost than any other competitor brand in the market, making them ideal for the one who wants to start some Projects through Different types of sensors.

After finding Different types of sensors on the market, we at robu. in have determined that DFrobot is one of the good brands that offer a wide range of sensors at an Appropriate price.

This is an Arduino compatible sound level meter(also known as a decibel meter, noise meter). It uses an instrument circuit and low noise microphone, which enable it to accurately measure the sound level of the surrounding environment. It can be applied to environmental noise testing, such as highway noise monitoring stations, bedroom noise monitoring, etc.

Nowadays, there are many kinds of sounds surrounding, some of which are really noisy. It is really essential to measure whether the sound is noisy enough to do damage to our health.

The sound level meter (also known as the decibel meter, or noise meter) is a basic noise measurement instrument. We have launched a sound level meter, which is compatible with Arduino, plug-and-play. It can accurately measure the sound level of the surrounding environment. This product uses an instrument circuit, low noise microphone, which makes it highly precise. It supports 3.3~5.0V wide input voltage, 0.6~2.6V voltage output. The decibel value is linear with the output voltage, which leads to a simple conversion, without a complex algorithm. The connector is plug-and-play, without welding, so this product can be easily used in your application.

Interfacing Analog Sound Level Meter with Arduino:


DFRobot Gravity: Analog Sound Level Meter



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 the surface of the conductor or the semiconductor, otherwise, it will shorten the microphone’s pins. It is recommended to place this module on a dry insulator’s surface or fix it with nylon columns to hang in the air.


  1. High Precision: use instrument circuit, low noise microphone
  2. Wide Voltage Input:3.3~5.0V
  3. Simple Conversion: linear analog output, 0.6~2.6V linear correspondence 30~130dBA, no complex algorithm is required
  4. Easy to Use: plug and play, without soldering

Useful Links:

Please visit the DFrobot wiki page for more information about this product. Any suggestions for improvement, such as correcting errors, adding more demo codes or tutorials, will be highly appreciated.

Package Includes:

1 x Analog Sound Level Meter

1 x Gravity Analog Cable 3Pin

SKU: 1141618 Category: Tag:
Measuring Range

30dBA ~ 130dBA

Measurement Error


Frequency Weighted

A Weighted

Frequency Response

31.5Hz ~ 8.5KHz

Time Characteristics


Input Voltage

3.3 ~ 5.0V

Input Current

22mA@3.3V, 14mA@5.0V

Output Voltage

0.6 ~ 2.6V

Module Size

60mm * 43mm

Shipping Weight 0.023 kg
Shipping Dimensions 8 × 6.5 × 2.5 cm
1 Month Warranty

This item is covered with a standard warranty of 1 month from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China