Bidirectional Electret Microphone Capsule 9.7mm

9.7mm Bidirectional Electret Microphone Capsule

ECM-9750 microphone circuit diagram and dimensions, showing key components and size for headset application

ECM-9750 microphone frequency response graph, showing unidirectional pickup and sensitivity across 50-10000 Hz

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

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

The ECM-715N is a 9.7 × 5 mm bidirectional microphone capsule with a sensitivity of -47dB±2 and a signal-to-noise ratio of 55dB. Designed for headsets, it ensures clear and accurate sound capture, making it ideal for various audio applications.

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Minimum order quantities (MOQs) apply.
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🧪 Sample

Free (std. models) + shipping

🧭 Trial Order

From 200 pcs (1st order only)

📦 MOQ

5,000 pcs (mixed models allowed)

Model: ECM-715N
Dimensions: 9.7 × 5 mm
Directivity: Bidirectional
Sensitivity: -47 dB ± 2
Impedance: 680 Ω
S/N Ratio: 55 dB
Max SPL: 110 dB
Operating Voltage: 1.5 Vdc
Frequency Response: 50 Hz ~ 10 kHz
Current Consumption: 500 μA

Tags: 9.7mm Electret Conference Mics Solder Pads Electret

Technical Specifications

Our 9750 microphone head features a dual-directional, anti-interference electret microphone core with advanced noise-canceling and noise-reduction capabilities, ensuring clear and precise audio capture.

Standard Test Circuit

ECM-715N Standard Test Circuit: 680Ω load, 1.5V supply, 1μF output

Tested with a 680Ω load resistor, 1.5V DC supply, and 1μF coupling capacitor.

Typical Frequency Response

ECM-715N Frequency Response Curve

Frequency response gradually rises from 80Hz and peaks around 7kHz before tapering off toward 10kHz.

Dimensions (UNIT: mm)

Dimensions of ECM-715N: Φ9.7×5.0mm

Capsule measures Φ9.7 × 5.0mm with a front dustproof mesh and rear sound port for acoustic input.

Packaging Overview

Standard packaging: 100 pcs per small box.
10 small boxes (1,000 pcs) are combined into one medium carton.
Several medium cartons are further packed into a large outer carton.
Pin-type microphones are protected with foam inside the small box.
Other types are packed directly or sealed in anti-static bags.

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.