Reproduce characteristics of rectangular magnetic heads

The spatial frequency response of gapped reproduce heads with finite depth and finite pole length (i.e., rectangular in cross-section) is determined by superposition of approximate solutions for zero depth and infinite depth-heads. The approach yields computationally simple formulae which are compared with frequency response deduced by analogy from electrostatic experiments with conducting paper. The approach to zero frequency is characterized by the response where is the wave number ( ) and the average of the length plus depth of the head. Increased head depth can result in improved low frequency response without changing the basic "head bump" spectrum.