最后简单介绍了替代传统压电陶瓷扬声器材料(PZT)的无铅钛酸铋钠压电陶瓷扬声器(BNT)的材料特性。

Also it introduces the features of BNT (Sodium bismuth titanate lead-free) replaced for traditional Piezoelectric ceramic speaker material (PZT) at last.

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高音和超低音扬声器的直径100mm 或3.94寸，铝制振膜，高音扬声器的圆顶振膜还增加一层陶瓷表面。

The tweeters and subwoofers measuring 100mm or 3.94" in diameter feature aluminum membranes with an additional ceramic surface on the tweeter domes."

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