| Image | Model | Size | Pattern | Sensitivity | Type | Key Feature | Application |
|---|---|---|---|---|---|---|---|
|
ECM-DM1508K150 | 15×8mm | Uni-directional / Cardioid | -66dB | Dynamic | Extreme noise rejection, lowest sensitivity | Extreme industrial / Mining |
|
ECM-DM2025K600 | 20.4×24.9mm | Uni-directional | -61dB | Dynamic | Vibration resistant, high durability | Vehicle dispatch / Fleet |
|
ECM-DM1910K600 | 19×10mm | Uni-directional | -56dB | Dynamic | High mechanical strength, impact resistant | Industrial field / Construction |
|
ECM-B1045UML50-25082 | 10×4.5mm | Uni-directional | -50dB | Electret | High performance, voice clarity, SNR 65dB | Noisy booth / Intercom |
Uni-directional polar pattern
Focuses on sound from the front direction, naturally attenuating side and rear ambient noise. This is the most effective passive noise rejection — no algorithms required.
Mid-low sensitivity control
Target: -50dB ~ -66dB. Low sensitivity forces a closer speaking distance, dramatically improving the signal-to-noise ratio at the source by reducing the pickup of ambient machinery, traffic, and crowd noise.
Voice-band frequency shaping
Optimized for 100Hz ~ 9kHz (human voice core). Dynamic models naturally attenuate frequencies below 100Hz (mechanical rumble) and above 9kHz (hiss), focusing on speech intelligibility.
Dynamic vs Electret selection
Dynamic mics have heavier diaphragms and lower sensitivity — they are naturally immune to mechanical vibration and are the preferred choice for high-vibration, high-noise applications like vehicles and industrial equipment. Electret mics offer a cost-effective uni-directional solution for less extreme environments.
| Parameter | Requirement | Why It Matters |
|---|---|---|
| Polar Pattern | Uni-directional — No omni-directional | Omni picks up ambient noise from all directions, defeating the purpose of noise cancellation. |
| Sensitivity | -50dB to -66dB | Mid-low to low sensitivity reduces ambient pickup and forces close-talking, improving SNR. |
| Mic Type | Dynamic (preferred) / Electret | Dynamic mics offer superior vibration rejection and noise immunity for extreme environments. |
| Frequency Response | 100Hz ~ 9kHz voice-band focus | Attenuates mechanical rumble and high-frequency hiss, enhancing speech clarity. |
Quick Selection Guide
Choose by your primary constraint — no complex calculations.
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