Car Cabin Electret Microphone – 9.7 × 5 mm, Overhead Lamp & Infotainment Screen

Car microphone capsule installed in vehicle cabin

ECM-B9750UP-45 microphone circuit diagram and dimensions, showing key components and size

ECM-B9750UP-45 microphone frequency response chart, showing sensitivity and performance across the frequency range

ECMIC microphones automated production line overview, showing assembly and quality control process

ECMIC microphones 12,000 m² factory with 6M+ units monthly output and ISO/CE certifications

Microphone capsule mounted near overhead lamp

Microphone capsule integrated into infotainment screen

High-performance 9.7 × 5 mm unidirectional electret microphone capsule designed for automotive cabins. Optimized for installation in overhead/map lamps and infotainment screens, ensuring clear driver voice capture, hands-free communication, and accurate voice recognition in noisy road conditions. Equipped with a 2-pin configuration for easy integration.

🚫 Factory direct sales only – no retail.
Minimum order quantities (MOQs) apply.
For audio brands & OEMs
📞 Contact us for orders & inquiries.

🧪 Sample

Free (std. models) + shipping

🧭 Trial Order

From 200 pcs (1st order only)

📦 MOQ

5,000 pcs (mixed models allowed)

Model: ECM-B9750UP-45
Dimensions: 9.7 × 5 mm
Directivity: Unidirectional
Sensitivity: -45 dB ± 2
Impedance: 2.2 kΩ
S/N Ratio: 58 dB
Max SPL: 110 dB
Operating Voltage: 1.5 Vdc
Frequency Response: 100 Hz ~ 10 kHz
Current Consumption: 500 μA

Tags: 9.7mm Electret Equipment Mics Pin-type Electret

Key Selling Points

● Overhead lamp installation – Close to driver for optimal voice pickup.

● Infotainment screen integration – Supports hands-free calling, voice commands, and infotainment interaction.

● Focused voice capture – Unidirectional design reduces engine, road, and cabin noise.

● Automotive-grade durability – Resistant to temperature extremes, vibration, moisture, and EMI.

● Compact and easy to integrate – 9.7 × 5 mm capsule with 2-pin terminals.

● Supports multi-microphone deployment – Ideal for vehicles requiring multiple microphones for full cabin coverage.

Recommended Installations

● Superior voice pickup, reducing engine, road, and cabin noise.

● Hidden and aesthetic installation, maintaining a clean interior look.

● Supports multiple microphones for full cabin coverage.

● Suitable for integration in dashboard modules or infotainment screens.

● Enables hands-free calling, voice commands, and infotainment interaction.

● Enhances overall cabin voice recognition when combined with other microphones.

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.