磁带重放厚度损失是中、长波长下录一放过程中最主要的一项损失,其值约占总损失的1/2(当记录波长λ=381μm时)。在基准磁平校正,磁带低频电声参数测试以及绝对测量短路带磁通的几种方法(直流置换法、对称磁头法、非磁性单匝头法)间进行量值转换时,都需要对重放厚度损失作严格的定量分析。文献上所见到的实例如日本松下公司等发表的技术报告中,就曾引用厚度损失公式作为定量计算两种 The loss of tape reproduction thickness is the most important loss during medium and long wavelength recording, accounting for about 1/2 of the total loss (when recording wavelength λ = 381μm). In the reference level correction, the tape low frequency electro-acoustic parameters of the test and absolute measurement of short-circuit magnetic flux several methods (DC replacement method, the symmetrical head method, non-magnetic single-head method) between the value conversion, Thickness loss for strict quantitative analysis. Examples seen in the literature such as Japan’s Matsushita and other published technical report, had quoted the thickness loss formula as a quantitative calculation of two