At ECMIC, we understand that when it comes to microphone capsules, customers often assume that a higher signal-to-noise ratio (SNR) automatically translates to superior noise resistance. However, these two performance characteristics are not the same.
Signal-Rausch-Verhältnis (SNR): SNR measures the ratio between the clean sound signal strength and the background noise strength, typically expressed in decibels (dB). The higher the SNR, the better the clarity of the audio. For microphone capsules, this means that the higher the SNR, the less internal noise it produces, resulting in cleaner sound. However, SNR alone does not guarantee strong resistance to external interference.
At ECMIC, we go beyond just focusing on SNR. We ensure that every microphone capsule we produce performs at the highest level in both signal clarity and noise resistance. Here’s what you should know:
- The inherent SNR of the capsule itself. This serves as the “ceiling” for the capsule’s overall SNR.
- Poor packaging or filtering of the capsule, which can reduce its SNR performance.
What Is Noise Resistance?
Noise resistance refers to how well the microphone capsule can suppress unwanted external interference. This is a different measure from SNR and is influenced by several factors:
- The inherent resistance to interference of the microphone chip: For example, our Korean 2324 chip features exceptional resistance to Wi-Fi signal interference, ensuring stable performance even in challenging environments.
- The contribution of the microphone’s filtering circuit: At ECMIC, we use advanced LCR circuits that contribute up to 70% to noise resistance, with ferrite beads (L) being one of the most effective components.
- PCB shielding: Our PCBs use double-sided copper-clad boards and large-area grounding, providing superior protection against external noise.
- Outer casing shielding: We ensure that the casing’s contact resistance is less than 1Ω to guarantee optimal shielding performance.
- Wiring shielding: To minimize interference, we use twisted pair wires or shielded cables in our microphone designs.
Our Expertise in Quality and Durability: At ECMIC, we don’t just focus on the performance of the capsule but also on the comprehensive quality control measures throughout our production process. Here’s what sets us apart:
- We implement over 21 parameter tests to ensure our microphone capsules meet the highest standards of quality.
- Our microphones undergo 18 quality control checkpoints, providing products you can trust.
- The error rate for our products is strictly controlled to less than 1 in 1,000.
- Our Mean Time Between Failures (MTBF) averages less than 10 PPM, reflecting our commitment to reliability.
- We conduct stringent tests such as 12-hour, 80°C aging tests, drop tests from 1 meter, salt spray, and humidity tests to guarantee the stability of our products under real-world conditions.
- We use environmentally friendly raw materials, all of which are ROHS certified, ensuring the sustainability and safety of our products.
Our findings: High-gain microphone capsules may exhibit slightly lower SNR compared to FET-based capsules due to their higher current flow and inherent noise. However, these high-gain capsules are specifically engineered to excel at noise resistance, ensuring that even close proximity to Wi-Fi signals doesn’t interfere with your recording. This makes our microphones a perfect choice for those seeking both clarity and robust performance in demanding environments.
With ECMIC, you don’t just get a microphone; you get a product backed by advanced technology, stringent quality controls, and a commitment to excellence in every capsule we produce. Trust ECMIC for the best in microphone performance and durability.
