4mm Gold-Plated Unidirectional Microphone Capsule for Two-Way Radios

4015 Cardioid Microphone for Headsets with Pin

4mm Cardioid Microphone for Headsets with Pin

Compact 4mm unidirectional microphone capsule designed for two-way radios. Features a triple-capacitor design for enhanced stability, gold-plated pins for superior conductivity, and a noise-canceling pickup pattern to deliver clear and reliable voice transmission in demanding environments.

Model: ECM-B4015UP40-474
Dimensions: 4 × 1.5 mm
Directivity: Unidirectional
Sensitivity: -40dB±2
Impedance: 2.2KΩ
S/N Ratio: 52dB
Max SPL: 105dB
Operating Voltage: 2Vdc
Frequency Response: 100Hz~16KHz

Tags: #4mm #Conference #Pin Type

The ECM-B4015UP40-474 is a 4mm unidirectional microphone capsule specifically engineered for two-way radios. Its triple-capacitor design ensures exceptional stability, reducing interference and maintaining consistent audio quality even in dynamic conditions.

With a sensitivity of -40dB±2 and a signal-to-noise ratio of 52dB, this microphone capsule captures clear and intelligible voice signals while minimizing background noise. Its frequency response of 100Hz-16kHz, coupled with its ability to handle up to 105dB SPL, makes it ideal for use in environments where clear communication is essential.

This capsule is equipped with gold-plated Cu pins, providing excellent electrical conductivity and resistance to oxidation, ensuring long-term reliability. Measuring just 4mm × 1.5mm, the compact design allows for seamless integration into communication devices.

Perfectly suited for two-way radios in industries such as security, retail, and outdoor communication, the ECM-B4015UP40-474 delivers superior performance with a focus on durability and reliability.

Standard Test Circuit

Typical Frequency Response

Appearance Dimension

Reliability Tests

High Temperature Test: Microphone subjected to +80℃ for 100 hours, followed by 3 hours at room temperature.

Low Temperature Test: Microphone subjected to -40℃ for 100 hours, followed by 3 hours at room temperature.

Humidity & Heat Test: Microphone exposed to +55℃ and 85% relative humidity for 100 hours, followed by 3 hours at room temperature.

Thermal Shocking Test: Microphone subjected to [+80℃ 0.5H → room temp 1H → -40℃ 0.5H → room temp 1H] for 10 cycles, then exposed to room temperature for 3 hours.

Vibration Test: Microphone subjected to two hours of vibration in x, y, and z directions with frequencies of 10-55Hz and a 1.52mm amplitude.

Drop Test: Microphone dropped 5 times from a height of 1.0 meter onto a slippery marble floor, without packaging, and still performs normally.

Storage and Operating Temperature Range: Suitable for environments ranging from -35℃ to +60℃.

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.

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