这非常合理，因为第二个麦克风是在手机背面。
This makes a great deal of sense because the secondary mic is on the back of the phone.
当你在录制视频时，他会使用第二个麦克风录音。
When you are recording video, it will use the secondary mic for the sound.
第二个好处是，将麦克风增益设置为保守(低)级别，可有效避免削波。
A secondary advantage is that by setting the microphone gain to a conservative (low) level, it is easier to avoid clipping.
应用推荐