Engineered for environments with electromagnetic and radio frequency interference — motors, VFDs, WiFi, Bluetooth, two-way radios, and wireless base stations. Dual capacitor, ferrite bead, and shielded housing ensure stable, noise-free audio capture.
External dual capacitor + ferrite bead + shielded housing. Premium-grade components for superior interference rejection.
Built-in dual capacitor with high SNR (70dB). Ideal for applications requiring both anti-interference and voice clarity.
Built-in ferrite bead suppresses EMI spikes. Bi-directional pattern for flexible installation.
Ultra-compact 4mm design with built-in dual capacitor. Pin type for easy integration.
Built-in dual capacitor with 72dB SNR. Large 14×6.5mm size for industrial applications.
Built-in or external dual capacitor structure cancels high-frequency RF interference from WiFi, Bluetooth, two-way radios, and cellular base stations. Prevents RF noise from entering the audio path.
Strategically placed ferrite beads suppress EMI spikes before they reach sensitive audio circuits. Eliminates buzzing, clicking, and transient noise from VFDs, motors, and switching power supplies.
Fully shielded microphone housing with premium-grade components. Reduces conducted and radiated interference, ensuring signal integrity in high-noise environments.
Shielded wire lead options block conducted EMI. Optimized impedance matching ensures plug-and-play compatibility — no additional tuning required.
| Parameter | Requirement | Why It Matters |
|---|---|---|
| EMI Protection | Dual capacitor / Ferrite bead / Shielded housing | Suppresses RF interference, EMI spikes, and conducted noise |
| Sensitivity | -28dB to -47dB (varies by model) | Balanced sensitivity prevents interference amplification |
| SNR | 55dB to 72dB | Higher SNR ensures clean signal extraction from noisy environment |
| Termination | Solder pad or pin type — shielded options available | Proper termination prevents conducted EMI pickup |
| Model | Size | Pattern | Sensitivity | SNR | Max SPL | Supply | EMI Protection | Termination |
|---|---|---|---|---|---|---|---|---|
| ECM-B9745UL-35 | 9.7×4.5mm | Uni-directional | -35dB | 56dB | 115dB | 1.5V | External dual capacitor + ferrite bead | Solder pad |
| ECM-B9750UL38-630 | 9.7×5mm | Uni-directional | -38dB | 70dB | 110dB | 1.5V | Built-in dual capacitor | Solder pad |
| ECM-715N | 9.7×5mm | Bi-directional | -47dB | 55dB | 110dB | 1.5V | Built-in ferrite bead | Solder pad |
| ECM-B4015AP28-1046 | 4×1.5mm | Omnidirectional | -28dB | 58dB | 100dB | 2V | Built-in dual capacitor | Pin 2.8mm |
| ECM-B1465AL30-279 | 14×6.5mm | Omnidirectional | -30dB | 72dB | 110dB | 2V | Built-in dual capacitor | Solder pad |
Choose by your interference type and form factor.
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