1-10pcs MH-ET LIVE Omnidirectional Microphone Module I2S Interface INMP441 MEMS High Precision Low Power Ultra volume ESP32 _x000D_ _x000D_ modname=ckeditor_x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ modname=ckeditor_x000D_ _x000D_ _x000D_ Product introduction: _x000D_ _x000D_ The INMP441 is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port. The _x000D_ _x000D_ _x000D_ The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog to digital converter, anti-aliasing filter, power management and industry standard 24-bit I2S interface. The I2S interface allows the INMP441 to be directly connected to digital processors such as DSPs and microcontrollers without the need for an audio codec for use in the system. The INMP441 has a high signal-to-noise ratio and is an excellent choice for near field applications. The INMP441 has a flat wideband frequency response that results in high definition of natural sound. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Product Features: _x000D_ _x000D_ 1. Digital I2S interface with high precision 24-bit data _x000D_ _x000D_ _x000D_ 2. High signal to noise ratio is 61 dBA _x000D_ _x000D_ _x000D_ 3. High sensitivity - 26 dBFS _x000D_ _x000D_ _x000D_ 4. Stable frequency response from 60 Hz to 15 kHz _x000D_ _x000D_ _x000D_ 5. Low power consumption: low current consumption 1.4 mA _x000D_ _x000D_ _x000D_ 6. High PSR: -75 dBFS _x000D_ _x000D_ Interface definition: _x000D_ _x000D_ SCK: Serial data clock for I2S interface _x000D_ _x000D_ _x000D_ WS: Serial data word selection for I2S interface _x000D_ _x000D_ _x000D_ L/R: Left/Right channel selection. _x000D_ _x000D_ _x000D_ When set to low, the microphone outputs a signal on the left channel of the I2S frame. _x000D_ _x000D_ _x000D_ When set to high level, the microphone outputs signals on the right channel _x000D_ _x000D_ _x000D_ SD: Serial data output of the I2S interface. _x000D_ _x000D_ _x000D_ VCC: Input power, 1.8V to 3.3V. _x000D_ _x000D_ _x000D_ GND: power ground _x000D_ _x000D_ This product provides tutorials for using ESP32 modules with I2S functionality. _x000D_ _x000D_ Connect to ESP32: _x000D_ _x000D_ _x000D_ INMP441 ESP32 _x000D_ _x000D_ _x000D_ SCK >> GPIO14 _x000D_ _x000D_ _x000D_ SD >> GPIO32 _x000D_ _x000D_ _x000D_ WS >> GPIO15 _x000D_ _x000D_ _x000D_ L/R >> GND _x000D_ _x000D_ _x000D_ GND >> GND _x000D_ _x000D_ _x000D_ VDD >> VDD3.3 _x000D_ _x000D_ What is the difference between an omnidirectional microphone and a unidirectional microphone: _x000D_ _x000D_ First of all, I understand that the sound divergence is all-round. One person speaks and diverge in the air. _x000D_ _x000D_ _x000D_ As for how far it can pass, it depends on many factors. _x000D_ _x000D_ _x000D_ 1.directional microphone, the general pickup radius is very small, 30 cm is a big one, single use, put it on the mouth, the sound quality is very good, because it is not picked up again. _x000D_ _x000D_ _x000D_ The shape is generally goose neck wheat, a rod, a curved rod, to your mouth, directivity, just listen to your voice. _x000D_ _x000D_ _x000D_ With a single-point microphone, the sensitivity is limited to a certain range. Sensitivity is too high, causing sharp whistling, etc., involving many other devices _x000D_ _x000D_ _x000D_ As for why not make a big pickup radius, there is a reason. Later _x000D_ _x000D_ _x000D_ 2.omnidirectional microphone, the general pickup radius is very large, one meter two meters three meters five meters have, compared with ten centimeters, this level is very different, it is not just picking a person\'s voice, but Multiple people, five six, seven eight or even ten. _x000D_ _x000D_ _x000D_ Omnidirectional microphones are highly sensitive, _x000D_ _x000D_ _x000D_ The omnidirectional microphone pickup radius is too large, and it will also pick up more ambient noise, so the sound quality is not as good as the single-point microphone, unless you do a good noise reduction. There is definitely a difference between collective use and single-person service. _x000D_ _x000D_ _x000D_ But omnidirectional wheat has a benefit, the wiring is simple, not one by one. Suitable for small meetings, ad hoc meetings, some remote discussions, remote operations. _x000D_ _x000D_ _x000D_ 3.single-point wheat generally supports local amplification, _x000D_ _x000D_ _x000D_ Omnidirectional microphones generally do not support local amplification. It should be noted that because of such high