This tiny MEMS microphone has an amplifier gain of 66. When there is no sound detected, it outputs voltage around 0.66*VCC. When speaking, you can easily get the acoustic waveform by ADC sampling. The module can be used on all kinds of 3.3V/5V main-controllers. Specifications * Signal Type: Analog signal * Power Supply: 3.3V/5V * Directivity: All-round * Sensitivity: -42dB * S/N Ratio: 59dBA * Frequency Range: 100Hz~8KHz * Dimension: 18*12.5 mm/ 0.71*0.49” Documents * Product wiki Shipping List * Fermion: MEMS Microphone Module ×1 * 2.54-3P Black Single Row Pin Header ×1 https://elecena.pl/product/27744546/dfrobot-fermion-mems-microphone-module 2025-01-23 https://elecena.pl/product/27744546/dfrobot-fermion-mems-microphone-module 2025-04-21 https://elecena.pl/product/27744546/dfrobot-fermion-mems-microphone-module 2025-12-21 https://elecena.pl/product/27744546/dfrobot-fermion-mems-microphone-module 2026-01-22 https://elecena.pl/product/27744546/dfrobot-fermion-mems-microphone-module 2026-01-30 https://elecena.pl/product/27744546/dfrobot-fermion-mems-microphone-module 2026-04-12