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The INMP441 MEMS High-Precision Omnidirectional Microphone Module is an ultra-compact, low-power digital acoustic sensing solution engineered for high-fidelity audio acquisition. Traditional analog microphones require external preamplifiers, filtering networks, and an Analog-to-Digital Converter (ADC) that often introduce ambient electromagnetic interference (EMI) and electrical hiss into the sound file. The INMP441 solves this by integrating a high-performance MEMS acoustic sensor, a built-in conditioning amplifier, and an onboard 24-bit hardware ADC directly into a single silicon chip.

Because the board utilizes the industry-standard I2C-adjacent I2S (Inter-IC Sound) 3-wire serial bus protocol, it pipes pure, uncompressed digital audio data straight to compatible microprocessors like the ESP32, Raspberry Pi, or STM32. The microphone port is located directly on the bottom side of the PCB (bottom-port configuration), meaning the device should be mounted facing outwards or paired with an enclosure acoustic hole to yield the cleanest, distortion-free pickup across a full 360-degree omnidirectional matrix.

Key Features & Benefits:

• Native 24-bit Digital Output: Outputs direct, uncompressed digital words via I2S, saving significant processing power on the host microcontroller.

• Outstanding Acoustic Metrics: Features a high Signal-to-Noise Ratio (SNR) of 61 dBA combined with a wide, flat frequency response spanning 60 Hz up to 15 kHz.

• Microscopic Power Dissipation: Draws a low 1.4 mA current during active operation and slips into a 10 µA low-power sleep state when the serial clock stops, preserving battery runtime for remote IoT arrays.

• Selectable Left/Right Stereo Channel Mapping: Includes a dedicated hardware pin (L/R) that allows two individual modules to share the exact same physical I2S bus lines to record dual-channel stereo audio tracks.

Technical Specifications

Here is the comprehensive, SEO-optimized product documentation and user guide for the INMP441 MEMS High-Precision Omnidirectional Microphone Module with I2S Digital Interface, formatted for your online store database.

Product SEO Name

INMP441 MEMS High-Precision Omnidirectional Microphone Module with I2S Digital Interface

SEO Oriented Short Description

Capture crystal-clear digital audio with the INMP441 MEMS Omnidirectional Microphone Module. Featuring a cutting-edge I2S (Inter-IC Sound) digital interface, this high-performance microphone outputs raw, high-fidelity 24-bit audio directly to your microcontroller, completely eliminating the need for an analog-to-digital converter (ADC) or external pre-amplifier. Boasting an excellent 61 dBA signal-to-noise ratio (SNR) and a wide, flat frequency response from 60 Hz to 15 kHz, it is the industry-standard choice for voice recognition systems, smart speakers, acoustic monitoring setups, and ESP32-driven IoT audio streaming applications.

HSN Code

• 85181000 (Microphones and stands therefor)

  Note: This HSN categorization covers raw microphones, MEMS audio acoustic sensors, and digital microphone breakout modules distributed within the local electronic development market. Please cross-verify with your legal tax consultant for final regional clearance.

Product Tags to Help in Search Results (SEO Oriented)

INMP441 Microphone, MEMS Digital Mic, I2S Audio Sensor, Omnidirectional Microphone Module, ESP32 Microphone, 24-bit Digital Audio, INMP441 Arduino, Smart Speaker Mic, Voice Recognition Sensor, Electroboat Technologies.

SEO Page Title

INMP441 MEMS Omnidirectional I2S Digital Microphone Module | Electroboat

SEO Meta Keywords

INMP441 price India, buy I2S digital microphone module, MEMS omnidirectional mic Arduino, ESP32 voice recognition sensor, Electroboat audio electronics.

SEO Meta Description

Buy the INMP441 MEMS High-Precision Omnidirectional Microphone Module with I2S Digital Interface at Electroboat Technologies. Ideal for ESP32, smart assistants, and 24-bit digital audio logging.

Product Dimensions

• Weight: 0.002 kg (Approx. 2 Grams net module weight)

• Length: 1.40 cm

• Width: 1.40 cm

• Height: 0.15 cm (Ultra-low profile framework)

SEO Oriented Detailed Description

Detailed Description

The INMP441 MEMS High-Precision Omnidirectional Microphone Module is an ultra-low-power, high-performance digital acoustic sensor engineered to deliver studio-clean audio pipelines straight to digital signal processors. Traditional analog microphones require tedious shielding, analog filtering, and an external pre-amplifier circuit to avoid heavy electromagnetic hums and line degradation over long wires. The INMP441 completely side-steps these structural vulnerabilities by integrating a high-sensitivity MEMS sensor element, an internal impedance converter, and an on-chip 24-bit hardware Analog-to-Digital Converter (ADC) onto a single piece of silicon.

Communicating over the industry-standard I2S (Inter-IC Sound) serial bus, the module streams fully digitized audio data samples directly to compatible microcontrollers. This clean, direct digital stream allows for seamless processing of voice recognition scripts and digital filters without adding any processing overhead or background hiss. Additionally, its bottom-port layout allows it to capture a true 360° omnidirectional sound field, giving it excellent clarity whether picking up close-up speech or distant room acoustics.

Key Features and Benefits

• Native I2S Digital Audio Output: Directly interfaces with modern microprocessors via a 24-bit digital data stream, bypassing any need for complex analog preamp circuitry or internal ADC scaling.

• Studio-Grade Acoustic Performance: Features a wide, flat frequency response window from 60 Hz to 15 kHz paired with a high 61 dBA Signal-to-Noise Ratio (SNR) for incredibly crisp voice tracking.

• True 360° Spatial Awareness: The omnidirectional pickup pattern captures incoming sound waves evenly from all physical angles, ensuring excellent ambient capture and structural balance.

• Microscopic Power Dissipation: Draws a minor 1.4 mA during active conversion loops and falls down to an ultra-low 5.5 µA during standby mode, making it highly optimized for battery-driven smart tech.

• Flexible Multi-Channel Architecture: Equipped with a physical hardware channel configuration pin (L/R). This lets you place two individual INMP441 modules onto a single shared I2S bus line to capture true stereo audio.

Technical Specifications

How to Use

⚠️ VOLTAGE AND LOGIC WARNING: The INMP441 is strictly a 3.3V sensor. Connecting the module to a 5V power source or sending 5V logic signals down its communication lines will permanently damage the internal MEMS element. When working with standard 5V microcontrollers like an Arduino Uno, you must use external logic level shifters.

Standard Pinout Mapping:

• SCK: Serial Data Clock line for the I2S interface.

• WS: Word Select line (sometimes labeled as LRCLK or Left/Right Clock). It defines the active audio channel.

• SD: Serial Data output line that streams the digitized 24-bit audio packets.

• L/R: Left/Right Channel Selection control pin.

• VDD: Power Input (1.62V to 3.63V DC max; connect directly to a clean 3.3V rail).

• GND: Ground common circuit reference path.

Step-by-Step Microcontroller Integration (e.g., using an ESP32):

1. Solder the Header Strip: Carefully solder the included 6-pin male header row onto the breakout module's outer solder pads.

2. Wire to the Host Processor: Make the following connections between your INMP441 module and an ESP32 micro-computing board:

   • Connect VDD to the ESP32 3.3V pin.

   • Connect GND to an ESP32 GND pin.

   • Connect SD to a GPIO data channel pin (e.g., GPIO 32).

   • Connect WS to a GPIO word select pin (e.g., GPIO 25).

   • Connect SCK to a GPIO clock line pin (e.g., GPIO 33).

3. Configure the Channel Pin: Tie the L/R pin directly to GND to assign the microphone as the Left Channel output stream. If you are building a stereo array, connect the L/R pin of your second microphone to VDD to set it as the Right Channel.

4. Compile the Software Driver: Open your software development environment (such as the Arduino IDE or ESP-IDF). Import an I2S library extension, configure the sample rate to 16 kHz or 44.1 kHz, and call the native I2S reading function to stream real-time digital audio directly to your serial monitor or SD storage block.

Applications

• Smart Voice Assistants & IoT Ecosystems: Serves as the primary voice pickup engine for custom smart speakers and home-automation control arrays.

• Speech-to-Text & AI Voice Training: Captures uncompressed, high-definition digital voice samples for offline AI voice training models and translation scripts.

• Acoustic Echo Cancellation Arrays: Multiple modules can be grouped together into a microphone array to handle advanced beamforming and remove localized environmental background noise.

• Spy Bugs & Remote Security Intercoms: Compact enough to fit inside hidden perimeters to stream clean, noise-free security audio over long communication lines.

• Wearable Health Audio Trackers: Ideal for small, wearable diagnostic patches designed to monitor breathing patterns or heart rates without drawing excessive power.

Package Includes

• 1 x INMP441 MEMS High-Precision Omnidirectional Microphone Module

• 1 x Straight 6-Pin 0.1" (2.54mm) Solder Male Header Strip

Shipping & Delivery

• Free shipping on all product orders above ₹999 across India

• Dispatched promptly within 1-3 business days

• Expected transit delivery times: Metro regions: 1-3 days; Other areas: 3-7 business days

• Safeguarded in static-shielding wrap configurations with protective bubble padding to ensure the delicate physical internal MEMS acoustic element remains perfectly intact during transit