A cancellation occures in the near response at the higher frequencies due to the wavelength and size of the diaphragm.
为何近场测试曲线相比于自由场中,在高频段会有许多起伏呢?
远场和近场,只是对上述公式作了简化。
跟距离有关,跟频率(波数)有关。
相当详细
看不到图啊