How MEMS Microphones Extract Audio Pressure into Electrical Signals

MEMS (Micro-Electro-Mechanical Systems) microphones are compact yet powerful components that convert audio pressure changes into electrical signals, enabling high-fidelity sound capture in modern devices.

How It Works

At the core of a MEMS microphone is a diaphragm and a backplate, forming a tiny capacitive sensor. When sound waves hit the diaphragm, it moves slightly, causing a change in capacitance. This change is then translated into an electrical signal by an integrated circuit, often within the same chip.

Many of today’s digital MEMS microphones also include a built-in ADC (analog-to-digital converter), which outputs audio data in PDM or I²S format, simplifying integration with microcontrollers and DSPs.

Key Benefits

  • Miniaturization: Ideal for compact designs such as wearables, smartphones, and TWS earbuds.
  • Low Power Consumption: Perfect for battery-powered IoT devices.
  • High SNR: Clean and accurate sound pickup in noisy environments.
  • EMI Resistance: Digital output reduces signal degradation.

Explore related products here:
🔗 Digital MEMS Microphones from SISTC
🔗 All MEMS Microphones

Real-World Applications

  • Smartphones and Tablets
  • Smart Home Devices
  • Voice Recognition Systems
  • Medical Instruments
  • Industrial IoT Sensors

Learn More

For a deeper dive into MEMS technology, refer to:
🔗 Analog Devices – MEMS Microphone Fundamentals
🔗 Knowles – Microphone Technology Overview

Why Choose SISTC?

Wuxi Silicon Source Technology Co., Ltd. (SISTC) offers a wide range of MEMS microphone solutions built on a reliable CMOS/MEMS platform, combining high audio performance, compact size, and energy efficiency for consumer, industrial, and medical applications.

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