Large Diaphragm Electret Microphone Cartridge without FET

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

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

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

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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