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Analog Sound Sensor Microphone Module for Arduino

Analog Sound Sensor Microphone Module for Arduino

₹134.00Price
🔍 What this module is
The Analog Sound Sensor Module is a microphone-based sensor used to detect sound intensity (loudness).
👉 Important:
  • It does NOT record audio
  • It only measures how loud the sound is
⚙️ Working Principle
  • Uses an electret microphone
  • Converts sound → electrical signal
  • Amplifier boosts signal
  • Outputs analog voltage based on sound level
➡️ Output voltage changes with sound intensity
⚙️ Key Specifications
  • Operating Voltage: 3.3V – 5V
  • Output Type: Analog (A0), sometimes Digital (D0)
  • Sensitivity: Adjustable via potentiometer
  • Signal Type: Sound intensity (not actual audio)
  • Frequency Range: ~16 Hz – 20 kHz (human hearing range)
🔌 Pinout
3-pin / 4-pin versions:
  • VCC → 3.3V / 5V
  • GND → Ground
  • AO (Analog Output) → Analog pin
  • DO (Digital Output) → Digital pin (optional)
🧠 Output Types (VERY IMPORTANT)
📊 Analog Output (AO)
  • Gives real-time sound level values
  • Used for:
    • Sound graphs
    • Noise measurement
⚡ Digital Output (DO)
  • HIGH/LOW based on threshold
  • Used for:
    • Clap detection
    • Sound trigger systems
💡 Applications
  • 👏 Clap switch (turn ON/OFF light)
  • 🔊 Sound level indicator (VU meter)
  • 🚨 Noise alarm system
  • 🎵 Music reactive LEDs
  • 🤖 Voice-triggered robotics
⚠️ Important Notes (very important)
  • ❌ Cannot measure exact decibels (dB) accurately
  • ❌ Cannot record or process audio
  • ⚠️ Output is noisy and fluctuating (normal behavior)
  • ⚠️ Needs filtering in code for stable readings
👉 Real-world issue:
  • Values don’t change much → normal for cheap modules (low amplification)
🆚 Types of Sound Sensors
TypeExampleUse
Basic AnalogKY-037 / KY-038Simple projects
Amplified MicMAX4466 / MAX9814Better audio sensing
Digital MicINMP441Advanced audio processing
👍 When to use this
Use this module if you want:
  • Simple sound detection
  • Clap-based projects
  • Noise level monitoring
👎 When NOT to use
Avoid this if you need:
  • Audio recording
  • Speech recognition
  • Accurate sound measurement
🧠 Final Understanding
👉 This sensor = “sound level detector” (not microphone recorder)
👉 Best for trigger-based projects, not audio processing
Quantity
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