Application Scenarios & Model Selection
| Application | Image | Model | Size | Sensitivity | SNR | Description |
|---|---|---|---|---|---|---|
| Main Dispatch Unit |  |
ECM-F9745AL36-186 | 9.7×4.5mm | -36±2dB | 65dB | Omnidirectional. 50-2KHz flat, 2K-5KHz boosted then roll-off. Standard for conference core systems. |
| Desktop Intercom Terminal |  |
ECM-B4015AML39-733 | 4×1.5mm | -39±2dB | 74dB | Omnidirectional. 50-5KHz flat, 5K-10KHz gentle roll-off. Ultra-thin design, high SNR, anti-howling. |
| Wall-Mounted Intercom Terminal |  |
ECM-B6022AP40-23383 | 6×2.2mm | -40±3dB | 60dB | Omnidirectional. 50-20KHz flat. Pin-type for mass assembly. |
| Emergency Call Terminal |  |
ECM-B4015AL38RC-L10 | 4×1.5mm | -38±2dB | 65dB | Omnidirectional. 50-2KHz flat, 2K-5KHz gentle roll-off. EMI resistant, wired design for easy installation. |
| Gooseneck Microphone |  |
ECM-B9750UL38-630 | 9.7×5mm | -38±2dB | 70dB | Unidirectional. 100-500Hz boosted (near-field effect), 500-8KHz flat, 8K-10KHz gentle roll-off. Suitable for gooseneck microphones, effective feedback suppression. |
Selection Principles
Size Grading
Gooseneck microphones use 9745/9750 series (9.7mm) for better acoustic performance. Desktop/wall-mounted terminals use 4015/6022 series (4-6mm) for slim enclosures. Unified sizing simplifies inventory management and assembly.
Polar Pattern Selection
Unidirectional for gooseneck microphones — effectively suppresses feedback in conference rooms by rejecting off-axis sound. Omnidirectional for embedded terminals — ensures 360° pickup coverage for multiple participants.
SNR Tiering
Main dispatch units and gooseneck mics use ≥70dB high SNR models for premium audio clarity. Emergency call terminals use 60-65dB models balancing cost and reliability.
Connection & EMI Protection
Solder pads for SMT assembly (desktop/wall units). Wire leads for emergency call terminals — EMI shielding ensures stable operation near power lines and elevators.
Performance Standards
Stable Voice Response
Optimized frequency response for natural, intelligible speech in conference communication scenarios.
High SNR
Low noise floor ensures clean audio quality in meeting room environments.
Sensitivity Consistency
Tight tolerance control ensures uniform performance across batches, reducing calibration efforts.
Anti-Feedback Design
Unidirectional pattern for gooseneck microphones effectively suppresses howling in conference rooms.
Reliability & Testing
Environmental Tests
- High/Low temperature & thermal shock (+80°C / -40°C)
- Humidity & moisture resistance (93% RH)
- Vibration, drop & mechanical shock
- Storage & operating cycle tests
Electrical & Acoustic Tests
- Sensitivity, frequency response & SNR
- Voltage & current characteristics
- Solder heat resistance
- Mechanical strength & distortion
RoHS Compliant
Lead-free, global market access
24/7 Continuous Operation
Low failure rate, extended lifespan
Mass Production Ready
Strict tolerance control, automated SMT ready
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Reliable microphone components for conference intercom systems.