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.
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。
3
It is demonstrated that the structure tailoring method by adding stiffeners is the lightest way to achieve the largest reduction in acoustic radiation power.