Omnidirectional Microphone Module I2S Interface INMP441 MEMS High Precision Low Power For arduino Module Board NEW _x000D_ _x000D_ _x000D_ _x000D_ Product Information: _x000D_ _x000D_ The INMP441 is a high-performance, low-power, digital output, MEMS omni-directional microphone with a lower port. AT _x000D_ _x000D_ The complete INMP441 solution consists of a microelectromechanical sensor, a signal, an air conditioner, an analog-to-digital converter, a smoothing filter, power management and an industry standard 24-bit I2S interface. The I2S interface allows the INMP441 to directly connect to digital processors, such as DSPs and microcontrollers, without the need for an audio codec in the system. The INMP441 has a high signal to noise ratio and is an excellent choice for short-range applications. The INMP441 has a flat broadband frequency response that results in high definition natural sound. _x000D_ _x000D_ _x000D_ _x000D_ Product Features: _x000D_ _x000D_ 1. Digital I2S interface with high precision 24-bit data _x000D_ _x000D_ 2. High signal to noise ratio 61 dBA _x000D_ _x000D_ 3. High sensitivity - 26 dBf _x000D_ _x000D_ 4. Stable frequency range from 60 Hz to 15 kHz _x000D_ _x000D_ 5. Low power consumption: low power consumption 1.4 mA _x000D_ _x000D_ 6. High PSR: -75 dBFS _x000D_ _x000D_ Interface Resolution: _x000D_ _x000D_ SCK: Serial SYNC for I2S interface _x000D_ _x000D_ WS: Serial Data Selection for I2S _x000D_ _x000D_ L / R: left / right channel selection. _x000D_ _x000D_ When set to low, microphone Outputs the signal to the left channel of the I2S frame. _x000D_ _x000D_ When set to high, the microphone outputs signals to the right channel _x000D_ _x000D_ SD: serial output of I2S interface data. _x000D_ _x000D_ VCC: input power, 1.8 V to 3.3 V. _x000D_ _x000D_ Grounding: Earth Power _x000D_ _x000D_ This product provides tutorials for using ESP32 modules with I2S features. _x000D_ _x000D_ Connect to ESP32: _x000D_ _x000D_ INMP441 ESP32 _x000D_ _x000D_ SCK> GPIO14 _x000D_ _x000D_ SD> GPIO32 _x000D_ _x000D_ WS> GPIO15 _x000D_ _x000D_ L / R> GND _x000D_ _x000D_ GND> GND _x000D_ _x000D_ VDD> VDD3.3 _x000D_ _x000D_ What is the difference between an omnidirectional microphone and a unidirectional microphone: _x000D_ _x000D_ Firstly, I understand that the discrepancies in sound are all-round. One person speaks and disperses in the air. _x000D_ _x000D_ As for how far he can go, it depends on many factors. _x000D_ _x000D_ 1. directional microphone, the overall radius of the pickup is very small, 30 cm large, one use, put it on your mouth, the sound quality is very good, because it does not rise again. _x000D_ _x000D_ The shape is usually a goose neck of wheat, a rod, a curved rod, to your mouth, focus, just listen to your voice. _x000D_ _x000D_ With a single-point microphone, sensitivity is limited to a certain range. The sensitivity is too high, causing a sharp whistle, etc., using many other devices _x000D_ _x000D_ Why not make a large pickup radius, there is a reason. Later version _x000D_ _x000D_ 2. an omnidirectional microphone, the total radius of the pickup is very large, one meter two meters three meters five meters have, compared to ten centimeters, this level is very different, this is not just a person's voice choice, but many people, five six, seven eight or even ten. _x000D_ _x000D_ Omnidirectional microphones are very sensitive, _x000D_ _x000D_ The radius of the omnidirectional microphone pickup is too large, and it will also receive more ambient noise, so the sound quality is not as good as a single-point microphone if you are not making good noise reduction. There is a certain difference between the general use and maintenance of one person. _x000D_ _x000D_ But omnidirectional Wheat has an advantage, the wiring is simple, not one after the other. Suitable for small meetings, special meetings, some remote negotiations, remote operations. _x000D_ _x000D_ 3. Single-point wheat generally supports local gain, _x000D_ _x000D_ Omni-directional microphones, as a rule, do not support local amplification. It should be noted that due to such a high sensitivity, the local whistle is very scary, and it is difficult to deal with modern technology. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_