我国规定磁平为单位磁迹宽度的短路带磁通,它是衡量录到磁带上信号大小的一个物理量,录音磁平的大小直接关系到录音质量的好坏。录音磁平增大可以提高信噪比,但失真会增大,减小录音磁平可以减小失真反,但信噪比却又会下降。因此,,为了保证录音质贵,我国去年发布的 China’s provisions for the magnetic flat magnetic track width of the short-circuit flux, which is measured on the tape to measure the size of a physical signal, the recording level is directly related to the recording quality of good or bad. Increasing the recording magnetic level can improve the signal to noise ratio, but the distortion will increase. Decreasing the recording magnetic level can reduce the distortion, but the signal to noise ratio will decrease. Therefore, in order to ensure the recording is expensive, our country released last year