When it comes to microphone sizes, especially electret condenser mic heads, commonly used sizes in electronic devices can be categorized as follows:
Mic Head Size Selection
The choice of mic head size generally depends on the dimensions of the product's casing and slots. Among the various options, Φ4.0, Φ6.0, and Φ9.7 series mic heads are the most commonly used in electronics because they offer a wider selection of models and have relatively lower production costs and prices compared to other sizes. Smaller and larger mic heads tend to have higher manufacturing costs.
Impact of Mic Head Size on Recording Quality
In terms of recording quality, there is little difference between different mic head sizes. Instead, performance mainly depends on the materials used, manufacturing techniques, and the stability of the mic's final specifications.
Key indicators such as signal-to-noise ratio (SNR), distortion rate, background noise, and frequency response consistency are crucial in determining a mic head's quality. The ultimate performance also relies on how well the mic matches the product's sound pickup requirements.
Professional Requirements for Larger Mic Heads
For professional-grade sound, it's worth noting that human speech typically ranges from 300 to 3500 Hz. Larger mic heads, with bigger diaphragms, generally have flatter frequency response curves, which can enhance recording quality. Therefore, mic heads like the Φ14 and Φ16 series or other models with larger diaphragms are often preferred in applications requiring high-quality sound.
However, for omnidirectional mic heads, the frequency response is usually flat within the 300-3500 Hz range, regardless of size. Therefore, recording quality differences across sizes are minimal, with distinctions primarily based on other factors.
