Miniature Electret Microphone for Bluetooth Earphones

The ECM-B3015AL-42 is a small-sized microphone capsule measuring 3 × 1.5 mm, suitable for products like Bluetooth earphones. With its omnidirectional directivity and -42dB±2 sensitivity, it ensures efficient sound capture.

  • Model: ECM-B3015AL-42
  • Dimensions: 3 × 1.5 mm
  • Directivity: Omnidirectional
  • Sensitivity: -42dB±2
  • Impedance: 2.2KΩ
  • S/N Ratio: 50dB
  • Max SPL: 110dB
  • Operating Voltage: 2Vdc
  • Frequency Response: 50Hz~20KHz

Our 3015 microphone head combines high sensitivity, dual capacitors, and anti-interference capabilities in a compact design, ensuring excellent performance.

Standard Test Circuit

Standard Test Circuit

Typical Frequency Response

Typical Frequency Response

Appearance Dimension

Appearance Dimension

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Packaging Overview

Electret Microphone Capsule Packaging

Reliability Tests

Sampling Process

  1. 1
    Confirm customer requirements:
    Review product application, microphone capsule specifications, usage scenarios, and sound quality needs.
  2. 2
    Recommend and specify:
    Provide recommended microphone capsule models and detailed specifications for customer evaluation.
  3. 3
    Sample provision and testing:
    Deliver microphone samples for customer testing and feedback purposes.
  4. 4
    Optimize and finalize:
    Refine microphone design based on feedback, finalize samples, and proceed to mass production upon quality approval.

Our Certificates

ECMIC Microphone Manufacturer Certificates

Our production meets ISO 9001:2015 and ISO 14001:2015 standards and is tailored for automotive applications under the IATF 16949:2016 standard, ensuring comprehensive quality management. Additionally, our products comply with ROHS, CE, and FCC requirements.

Quality Assurance

Incoming Quality Control

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

Process Quality Control

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

Outgoing Quality Control

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

Acoustic Laboratory

B&K Audio Analyzer

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

Imaging Mapping Analyzer

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

XRF Analyzer

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

Automatic Workshop

Automatic Workshop

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

Automatic Workshop

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

Automatic Workshop

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

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