1 响度更大

Bigger loudness

2.增益需要更少

Less gain require

3.保持听觉平衡

Keep hearing balance

4.方向感好

Better sense of direction

5.有立体声感觉

Better sense of dimensional sound

6.减少声反馈发生几率

Less ratio of feedback (Whistle)

7.有效削减环境噪声，提高信噪比

Reduce environment's noise, enhance SNR

8.消除头颅阻隔影响

Dispel head shadow effect

9.改善听觉剥夺现象，保护残余听力

Avoiding late-onset auditory deprivation

10.避免维修时，陷入无助听器可用的尴尬状况

If one HI to repair, the other HI is available