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Technical Documents

Sound Detection Sensor

Application Resources

Sound Detector Sensor Module

EMS-00004-B

(Last updated) Jun 20, 2026

Sound Detector

Sound and noise detection sensor.

Subcategory
EMS - Input: Sensors

Description

The Sound Detector Module (Blue) is a microphone-based sensor used to detect surrounding sounds and convert them into electrical signals. It typically combines an electret microphone with an LM393 comparator to provide both analog and digital outputs. The module is widely used in sound-activated switches, noise monitoring, voice-triggered systems, robotics, automation, and Arduino-based projects.

Manufacturer Details

Manufacturer Part Number
Keyes Electronics KY-038
DFRobot SEN0232
AZDelivery KY-038

Technical Specifications

Product Type Sound Detection Sensor
Model KY-038 / KY-037
Main IC LM393 Comparator
Operating Voltage 3.3V – 5V DC

Part Family Variants (3)

Variant Title Status
EMS-00004-A Sound Level Sensor Published
EMS-00004-B Current Sound Detector Published
EMS-00004-C Microphone Module Published

Frequently Used Together

Frequently paired together in real-world projects.

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