Random pulse width modulation technique can be used to distribute voltage harmonics over a wide frequency range and to realize the reduction of acoustic noise and vibration.
随机脉宽调制技术可以使逆变器输出电压的谐波成分均匀地分布在一个较宽的频率范围内，达到抑制噪声和机械振动的目的。
Its propulsion also employs special noise reduction features to reduce its acoustic signature.
它的推进装置具有专门的降噪特征去减少它的声音特征。
It is demonstrated that the structure tailoring method by adding stiffeners is the lightest way to achieve the largest reduction in acoustic radiation power.
通过多个声辐射数值优化计算算例，对比分析了三种结构修改方式的优化结果，比较可以发现加强筋的优化效果最好，重量最轻。
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