In headphone design, the microphone head, as the core sound receiving component, is most affected by call clarity and active noise reduction. In recent years, microphone manufacturers have been researching dynamic and polar microphones. The updates and iterations of microphone technology have directly promoted consumer-grade headphones to move towards professional sound quality and a comfortable experience.
Dynamic Microphone
The dynamic microphone head is a small expert in low-frequency enhancement and anti-interference. It uses the principle of electromagnetic induction to achieve sound-electric conversion through the linkage between the diaphragm and the coil. The design of the large diaphragm can enhance low-frequency response, and coupled with the optimization of the headphone acoustic cavity, the low-frequency texture of music has been greatly improved. Furthermore, the dynamic coil structure has higher stability, and headphones with embedded dynamic coil microphones can effectively suppress interference when in motion or noisy areas. Some high-end headphones have achieved accurate capture of multi-band sound through the design of composite dynamic microphone heads.
Electret Microphone
The advantages of an electret microphone are more reflected in the balance between miniaturization and high sensitivity. It reduces its volume to within 3mm due to the spontaneous polarization characteristics of the polarizable material. This feature allows the electret microphone to be flexibly embedded in headphones, reducing the size of the headphones and releasing space, enhancing the comfort of wearing headphones for us. The high sensitivity of the polar microphone is very suitable for voice interaction scenarios, as it can accurately capture various details of lip and tooth sounds during conversations. With the help of AI algorithms, it can achieve a speech recognition accuracy of over 98%. In TWS earphones, the electret array technology can effectively separate human voice and environmental noise through beamforming, improving call clarity.
