Sign in Subscribe

20251EIOT8: IoT Decibel Meter

Last updated on 
20251EIOT8: IoT Decibel Meter
Source - DB meter by Danoplus

Brief Introduction & Functionality

A decibel meter is a sound pressure measuring instrument for standardized measurements that uses the decibel scale. For this reason, the decibel meter is also known as a sound pressure level (SPL) meter. Other common names include noise meter and sound level meter.

A decibel meter uses a microphone to capture sound. The mic captures sound pressure deviations and converts them into an electrical signal that is made stronger by a preamplifier.

The decibel meter then uses signal processing to apply frequency and time weightings to the signal according to international standards.

These measured noise levels are expressed in decibels (dB) and displayed on the instrument’s screen. Some decibel meters also show additional acoustic parameters such as the equivalent continuous sound level.

Decibel meters are usually portable and run on batteries. However, in certain cases, sound level meters used for continuous monitoring of noise levels in a particular environment can be permanently installed.

Source:-

How To Use A Sound Level Meter | What Is A Decibel Meter
Have you ever wondered what a sound level meter is? You are not alone. This sound measurement instrument is gaining popularity and has many people asking what it’s for and how to use a sound level meter.
Decibel Meter App | Best Digital Sound Level Meter For Your SmartphoneAlex Savchuk

Design Scope

Tentative List of Components

Below list may vary according to the project's requirements and scope of work.
  • Outer Casing
    • Acrylic Sheets
  • Wire Holding Clamps inside the case
    • 3D prints
  • Electronics
    • Sound Level Sensor
    • Resistors
    • Capacitors
    • LEDs
    • Battery/Power Supply
    • Jumper/Connecting wires
    • Relays
  • Programming
    • Microcontrollers
    • Arduino
    • ESP32
  • Respective Stencil for designed PCB (LED Screen - To be designed according to PCB)

Skills Required

  1. PCB Design
  2. CAD Design
  3. 3D Printing FDM
  4. Fabrication (Acrylic Sheet Cutting)
  5. Drilling
  6. PCB Milling
  7. Surface-Mount Technology (SMT) Soldering
  8. Manual Soldering
  9. Electronic Testing
  10. Arduino Programming or ESP32 Programming

Market Survey

  1. DB Meter - Danoplus
DP-389 Decibel Meter Recorder 13 Inches Sound Level Meter, Wall Mount Noise Meter for Classroom Sound Meter with 16.4ft Sensor, Buzzer Alarm and Unlimited Data Logging, Noise Meter Decibel for Studio, Home – Danoplus
✅【Decibel Data Logger】DANOPLUS decibel meter can record decibel data every 2 seconds, it’s able to store ONE YEAR data and display and export real-time data for analysis when connect to software in PC ✅【13-inch HD Screen】The noise meter is designed with 13 INCHES HD Display, each digit number has 4 inches big, you may monitor the sound level clearly even from far away ✅【Audible & Visual Alarm】This classroom noise meter will emit Audible and Visual alarm when the decibel level reach the decibel threshold(default is 120dB), you may manually adjust the decibel threshold and alarm duration time ✅【16.4FT Sound Sensor】DANOPLUS wall mounted sound decibel meter is equipped with 16.4 feet extra Long sound sensor, you may detect all of the sound source around based on your need ✅【Multi-Functional】This noise monitor is Desktop and Wall mount design, decibel level analog bar indication, 12V external alarm output with 3.5mm port, 30~130dB measurement range

Useful Resources

  1. Decibel Chart - For understanding sound levels
Decibel Chart: Essential Guide to Sound Levels
Understand the decibel chart, learn about sound levels, and discover how different noises impact hearing health with this comprehensive guide.
HearzapTeam Hearzap
  1. Arduino Decibel Meter - Instructables.com, A Basic implementation with microphone
Arduino Decibel Meter
Arduino Decibel Meter: This project will help you to monitor the noise or sound level by measuring sound pressure.
InstructablesInstructables
  1. Sound level sensor - KY037 Microphone along with example code for testing
KY-037 Microphone sound sensor (high sensitivity) - SensorKit
This sensor emits a signal if the front microphone of the sensor perceives a noise.
SensorKit
  1. Unsafe Noise Level detector - Instructables.com, Arduino based implementation with custom wooden case
Unsafe Noise Level Meter or Sign
Unsafe Noise Level Meter or Sign: I love looking at peoples’ creative projects. Modern tools & technology give us so many creative options. I teach hard materials to secondary school students at a high school in New Zealand so I’m always developing & trialing new things. Thi…
InstructablesInstructables
  1. Amplifier circuit to measure the faraway noise signals by first amplifying them and then analyzing them.
Measure Sound/Noise Level in dB with Microphone and Arduino
In this project we will use a normal Electret Condenser microphone with Arduino and try measuring the sound or pollution level in dB as close as possible to the actual value.
CircuitDigestAswinth Raj