noise-improvement factor

例句：

1. 1.The noise-improvement factor of this device is very high, which greatly improves its performance.
   这个设备的噪声改善因子非常高，极大地提高了其性能。
2. 2.The noise-improvement factor of the new product is significantly better than that of the old one.
   新产品的噪声改善因子明显优于旧产品。
3. 3. The noise-improvement factor of the building has been reduced by 30% due to the new soundproofing measures taken.
   由于采取了新的隔音措施，该建筑的噪声改善因子已降低30%。