Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Interface Type	Serial TTL (UART)
Detection Range	30dB to 130dB
Operating Voltage	3.3V - 5V DC
Communication Baud Rate	9600 bps (default)
Dimensions	25mm x 18mm x 8mm
Weight	4.5 grams
Response Time	< 100ms
Microphone Type	Electret Condenser
Mounting Hole Diameter	3mm
Application Scope	Industrial Noise Monitoring, Smart Home Automation

6 reviews

Anonymous

Mar 24, 2026

Rating: 5/5

Reliable serial communication

I bought five of these for a classroom setup. All units communicated flawlessly via UART. The documentation provided clear pinout details, making integration smooth for students.

Anonymous

Mar 22, 2026

Rating: 5/5

Perfect for my Arduino project

This sensor was exactly what I needed for my noise monitoring prototype. The TTL output makes it incredibly easy to connect directly to my microcontroller without extra amplification circuits. Data readings are stable and consistent.

Anonymous

Mar 20, 2026

Rating: 4/5

Works well for trigger events

Using this to trigger lights when noise levels exceed a certain threshold. It reacts quickly. The only downside is that extreme humidity seems to affect readings slightly, but it's fine for indoor use.

Anonymous

Mar 12, 2026

Rating: 5/5

Excellent sensitivity

The sensitivity range is impressive for such a tiny module. I can detect subtle changes in ambient sound pressure. Highly recommended for anyone building sound-activated robotics.

Anonymous

Mar 10, 2026

Rating: 3/5

Decent but needs calibration

It works out of the box, but the default dB values were off by about 5dB compared to my phone app. After writing a simple calibration script, it performs much better. Good budget option.

Anonymous

Mar 04, 2026

Rating: 4/5

Good value, compact design

Very small form factor which fit perfectly into my tight enclosure. The accuracy is decent for the price point, though I had to calibrate it slightly against a professional meter. Great for hobbyist use.

5 FAQ

Q: Can I power this directly from a 3.3V ESP32?

A: Yes, the operating voltage range is 3.3V to 5V DC, so it is fully compatible with 3.3V logic systems like the ESP32 without needing a level shifter.

Q: Is the baud rate configurable?

A: The default baud rate is 9600 bps. Changing it typically requires sending specific configuration commands via the serial interface as detailed in the datasheet.

Q: Does this module output analog voltage or digital data?

A: This module outputs digital data via Serial TTL (UART). It does not provide a raw analog voltage output proportional to sound pressure.

Q: What is the maximum distance this sensor can effectively measure sound?

A: As a sound pressure sensor, it measures the noise level at its immediate location. It does not have a 'distance' rating like a radar; it captures ambient sound pressure wherever it is mounted.

Q: Is this sensor waterproof for outdoor installation?

A: No, this module is not waterproof. It should be installed indoors or within a weatherproof enclosure if used outdoors to prevent damage from moisture.

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