Description

Note: it works with esp32 boards only

The header pin for the module comes unsoldered (the header pin is included).

INMP441 Omnidirectional Microphone Module has a high signal-to-noise ratio, suitable for near-field applications. It has I2C interface which 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 microphone’s directionality or polar patterns define the specific characteristics of how it will capture sounds. The pickup pattern is the building block of mics, allowing them to capture whispers or reject audible sounds.

The microphone pickup pattern is sensitive to capture sound within its range. Therefore, every microphone picks the sound source from its diaphragm according to its directionality. Based on their sensitivity, microphones are categorized into three pickup patterns: unidirectional, bidirectional, and omnidirectional.

Omnidirectional mics capture quality sounds from every direction. Since the microphones do not have a specific pickup pattern, they provide quality recordings for conferences or public meetings.

It’s greatly helpful in studio environments with multiple musicians and it helps edit post-production recordings. These mics ensure equal gains by sensitively collecting the audio from every direction.

• Omnidirectional mics are superior due to their crisp, clear audio and can be used upside down without impacting the quality.
• The mic is ideal for recording background noises during conferences and has no definite audio source.
• Because it captures from all directions, it is difficult to isolate different channels, and the ratio of indirect to direct sound will not be possible.
• It has a high-performance, low-power, digital output, omnidirectional microphone with a bottom port.
• It has a digital I2C interface with high-precision 24-bit data.
• Low power consumption, low current consumption
• It has a high PSR: -75 dBFS
• Interface definition:
  • SCK: Serial data clock of I2C interface
  • WS: Serial data word selection for I2C interface
  • L/R: left/right channel selection.
    • When set to a low level, the microphone outputs signals on the left channel of the I2C frame.
    • When set to a high level, the microphone outputs the signal on the right channel
  • SD: Serial data output of I2C interface.
  • VCC: Input power, 1.8V to 3.3V.
  • GND: Power ground