9.7mm Omnidirectional Microphone Element for Long-Distance Audio Pickup

9745 Omnidirectional Microphone Element for Long-Distance Audio Pickup

The ECM-B9745AL30RC is a 9.7 × 4.5 mm omnidirectional microphone capsule, suitable for long-distance sound pickup equipment and condenser microphones. It features a sensitivity of -30dB±2 and a signal-to-noise ratio of 74dB, ensuring clear and consistent audio quality.

Model: ECM-B9745AL30RC
Dimensions: 9.7 × 4.5 mm
Directivity: Omnidirectional
Sensitivity: -30dB±2
Impedance: 2.2KΩ
S/N Ratio: 74dB
Max SPL: 110dB
Operating Voltage: 2Vdc
Frequency Response: 50Hz~20KHz

Tags: #9.7mm #Equipment #Solder Pads

Our 9745 microphone head uses a high-quality Korean RF chip, ensuring stable and reliable performance. This omnidirectional transducer with a sensitivity of -30dB guarantees effective long-distance sound pickup.

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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