This has first proved that the maximum noise is mainly caused by the local vibration of acoustic generating body in the process of revolute cutting. 这一点首次证明了旋转锯切过程中，最大噪声是由主要发声体的局部振动引起的。
Hartmann hydrodynamic acoustic generator can be used for acoustic treatment and is characterized by low cost, simple construction, durability and convenient power source. 哈特曼流体动力式声波发生器是一种声处理发声器,具有成本低廉、结构简单、坚固耐用以及动力源方便等特点。
The field application results show that the permeability of low-permeability cores and high-permeability cores can increase by 126.5% and 177.l% respectively by using Hartmann acoustic generator. 相关的现场应用试验结果表明，经哈特曼发声器作用后，较低渗透率岩心的渗透率提高了126.