High Sensitivity Digital MEMS Microphone – Audio Pickup

application scenarios for voice assistants

application scenarios for voice-interactive

The ECM-M4737-2660D is a high-sensitivity, high-performance digital MEMS microphone designed for premium audio capture and voice recognition applications. Its excellent sensitivity and acoustic performance make it ideal for consumer electronics, automotive systems, and high-end IoT devices. Measuring 4.72mm x 3.76mm x 1.25mm, it is slightly larger than the ECM-M4030-2961D but still compact and suitable for various embedded designs.

Model: ECM-M4737-2660D
Dimensions: 4.72 × 3.76 × 1.25 mm
Directivity: Omnidirectional
Sensitivity: -26dB±3
Impedance: 500Ω
S/N Ratio: 58dB
Max SPL: 100dB
Operating Voltage: 2Vdc
Frequency Response: 100Hz~10KHz

Tags: #Security Microphone Capsules

Performance Overview

The ECM-M4737-2660D offers superior sensitivity and outstanding acoustic performance. With a sensitivity of -26±3dB, it captures even more subtle sound details, making it ideal for high-quality audio recording. The 58dB SNR ensures clean audio output even in noisy environments. Its larger acoustic port diameter (Φ0.84mm) further enhances sound capture clarity. A broad voltage range (1.6V – 3.6V) and PSR of -70dB provide stable operation across diverse power environments.

Application Scenarios

Consumer electronics, such as smartphones, tablets, and laptops, for high-quality audio recording and voice recognition.
Automotive electronics, including in-car voice assistants and hands-free communication systems, where high sensitivity and noise resistance are essential.
High-end IoT devices, such as smart surveillance systems and voice-interactive equipment, requiring premium audio fidelity and control capabilities.

Standard Test Circuit

Typical Frequency Response

Appearance Dimension

Packaging Overview

Use ESD-safe reel and carrier tape for packing.
Quantity per reel: 5,000 pcs.
Each reel is sealed in a moisture-proof, anti-static bag.
Strict anti-static procedures are followed during the packing process.
Label includes model number, quantity, lot number, and manufacturing date.

Reliability Tests

Thermal Shock: 100 cycles of air-air thermal shock from -40℃ to +100℃ with 15-minute soaks.

High Temperature Bias: +125℃ environment while under bias for 1000 hours.

Low Temperature Bias: -40℃ environment while under bias for 1000 hours.

Temperature/Humidity Bias: +85℃/85% relative humidity environment while under bias for 1000 hours.

Mechanical Shock: 3 pulses of 10,000g in the X, Y, and Z directions.

Vibration Test: 10～60Hz: 0.35mm; 60～500Hz: 5g, 1 octave/min, Duration: 15 minutes per plane.

Drop Test: 1.5-meter height onto a concrete surface in three directions while in packaging.

Reflow: 5 reflow cycles with a peak temperature of +260℃.

ESD Protection: 150pF, 330Ohm, contact discharge ±2KV/air discharge ±4KV, 10 times, applying voltage to I/O pins.

Sampling Process

Confirm customer requirements:

Review product application, microphone capsule specifications, usage scenarios, and sound quality needs.

Recommend and specify:

Provide recommended microphone capsule models and detailed specifications for customer evaluation.

Sample provision and testing:

Deliver microphone samples for customer testing and feedback purposes.

Optimize and finalize:

Refine microphone design based on feedback, finalize samples, and proceed to mass production upon quality approval.

Quality Assurance

Conducting sampling inspections of incoming materials to ensure compliance with standard requirements.

Performing inspection audits to ensure the stability and control of the entire manufacturing process.

Conducting pre-shipment inspections to ensure that products meet established quality standards.

Acoustic Laboratory

Testing of background noise, sensitivity, frequency response curve, and directionality indicators.

Verification of the impact of different circuits, structural dimensions, materials, and processes on indicators.

Reliability testing at both the new product design stage and the mass production regular stage.

Automatic Workshop

Utilizing fully automated production lines to ensure high efficiency and consistency.

Equipped with state-of-the-art facilities, including a 10,000-level dust-free workshop.

Employing a rigorous 21-step process to guarantee product stability.