Application Scenarios & Model Selection
| Application | Image | Model | Size | Sensitivity | SNR | Description |
|---|---|---|---|---|---|---|
| Door Station |  |
ECM-B6027AML38-728 | 6×2.7mm | -38±2dB | 75dB | Omnidirectional. 50-20KHz flat. Outdoor high-end, wind noise resistant. |
| Indoor Unit |  |
ECM-B4015AML39-733 | 4×1.5mm | -39±2dB | 74dB | Omnidirectional. 50-5KHz flat, 5K-10KHz gentle roll-off. Slim design, anti-howling, low noise floor. |
| Control Center |  |
ECM-F9745AL36-186 | 9.7×4.5mm | -36±2dB | 65dB | Omnidirectional. 50-2KHz flat, 2K-5KHz boosted then roll-off. High sensitivity for long-distance pickup. |
| Elevator Intercom |  |
ECM-B4015AL38RC-L10 | 4×1.5mm | -38±2dB | 65dB | Omnidirectional. 50-2KHz flat, 2K-5KHz gentle roll-off. EMI resistant, wire lead for easy installation. |
| Underground Garage |  |
ECM-F6027AP-40 | 6×2.7mm | -40±2dB | 60dB | Omnidirectional. 50-5KHz flat, 5K-10KHz gentle roll-off. Reverberation resistant, pin-type for SMT assembly. |
Selection Principles
Size Compatibility
Slim indoor terminals (indoor units, elevators) use 4015 series (4×1.5mm). Outdoor/public areas (door stations, garages) use 6027 series (6×2.7mm). Central consoles use 9745 series (9.7×4.5mm). Unified sizing simplifies assembly and inventory management.
SNR Tiering
Critical terminals (door stations, indoor units) use ≥70dB high SNR models for premium audio quality. Public areas (garages) use 55-65dB models balancing cost and performance.
Connection Type
Slim devices use solder pads. Outdoor mass-production units use pins. Long-cable applications (elevators) use wire leads — matching building intercom assembly practices.
Environmental Adaptability
Outdoor/underground models feature wind noise resistance, reverberation suppression, and EMI shielding — designed for complex building environments.
Performance Standards
Stable Voice Response
Optimized frequency response with minimal fluctuation ensures natural, intelligible speech for accurate communication across all building zones.
High SNR
Low noise floor effectively filters out wind noise, vehicle noise, and EMI interference for clean calls.
Sensitivity Consistency
Tight tolerance control ensures uniform performance across batches, reducing production line tuning efforts.
Wide Temperature Range
Stable operation across outdoor, indoor, elevator shaft, and underground environments.
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
Core Advantages
Anti-Feedback Design
Optimized sensitivity and frequency response reduce feedback in close speaker-microphone layouts, simplifying tuning.
Globally Compatible
Wire, pin, and solder pad interfaces available, covering 4015/6027/9745 series — adaptable to various product structures.
Mass Production Ready
Strict parameter control ensures uniform performance across large batches, reducing calibration costs.
Clear Communication
Wind noise & reverberation resistant
High Reliability
24/7 continuous operation
Easy Mass Production
SMT-ready options available
EMI Protected
Designed for elevator & garage use
Simplify building intercom development — ready-to-use microphone solutions for every zone.