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在磁性记录与重放过程中,由于磁头与磁带的电磁特性比较特殊,为了保证录放音讯号的高保真度,在录音和放音过程中都依一定的国际标准规定加以补偿,称为录放音均衡。影响重放特性的因素很多,其中有自去磁损耗、记录去磁损耗、间隔损耗、缝隙损耗以及磁头的涡流损耗和磁滞损耗。它们都和记录波长、记录媒质厚度以及磁头材料和结构有关,这种与频率有关的性质可以由录放均衡网
In the magnetic recording and playback process, due to the electromagnetic characteristics of the head and the tape is rather special, in order to ensure the high fidelity of audio and video recording and playback, during recording and playback are compensated according to certain international standards, called recording and playback balanced. Replay characteristics of many factors, including self-demagnetization loss, record the demagnetization loss, the interval loss, the slot loss and the head eddy current loss and hysteresis loss. They are related to the recording wavelength, the thickness of the recording medium, and the material and structure of the magnetic head. Such frequency-dependent properties can be controlled by a recording and playback balance network