A refined technique using Acoustic Emission has been developed for use in head/disk interface contact detection. These refinements are focused on the design parameters of the Acoustic Emission electronics, amplification and filter settings, which permit accurate and repeatable contact detection measurements. A technique for determining the slider body natural frequencies is described in order that the proper filter design parameters can be determined. Experiments confirm the existence of these frequencies for a Al2O3TiC 50 percent slider are in excess of 600 KHz.

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