14mm Cardioid Electret Microphone Insert for Live Broadcast

The ECM-B1455UML36-813 is a 14 × 5.5 mm unidirectional microphone capsule suitable for microphone products such as broadcasting and live streaming microphones. With a sensitivity of -36dB±2 and a signal-to-noise ratio of 79dB, it ensures high-quality audio capture for voice recording and broadcasting applications.

Model: ECM-B1455UML36-813
Dimensions: 14 × 5.5 mm
Directivity: Unidirectional
Sensitivity: -36 dB ± 2
Impedance: 2 kΩ
S/N Ratio: 79 dB
Max SPL: 120 dB
Operating Voltage: 2 Vdc
Frequency Response: 100 Hz ~ 16 kHz
Current Consumption: 200 μA

Request Information / Sample

Tell us your project stage. Our engineering team will respond accordingly.

Lead Time

Samples: 1–3 weeks
Mass production: 2–4 weeks

Customization

Application-based engineering support
Structure / sensitivity / acoustic tuning

MOQ

3,000 pcs
Per model / per production batch

Certification

RoHS & UL compliant
Industrial reliability assured

Technical Specifications

Our 1455 microphone core offers Hi-Fi sound quality, boasting a distortion rate of ≤1% and a signal-to-noise ratio of 79dB. With high fidelity, low noise, and excellent reproduction capabilities, it ensures an immersive audio experience.

Standard Test Circuit

ECM-B1455UML36-813 Standard Test Circuit: 15kΩ bias, 2V supply, 1μF output

15kΩ bias resistor, 2V DC supply voltage, and 1μF output capacitor in standard test configuration.

Typical Frequency Response

ECM-B1455UML36-813 Frequency Response: fluctuating response from 100Hz to 16kHz with roll-off after 10kHz

The frequency response exhibits moderate variation with a clear drop beginning near 10kHz and continuing towards higher frequencies.

Dimensions (UNIT: mm)

ECM-B1455UML36-813 Dimensions: Φ14 × 5.5mm capsule with front dust mesh and rear acoustic port
Φ14 × 5.5mm capsule featuring a front dust mesh and two rear acoustic ports, both covered with damping mesh.

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.