Patent ID: 8773809
Filing Date: 2014-07-08
Classification: G11B

Abstract:
1. A method for detecting a contact event between a sensing device and a storage medium, comprising: receiving a signal operable to indicate a physical proximity between the sensing device and the storage medium; processing a data set derived from the signal to generate a plurality of frequency bin outputs; comparing one or more frequency bin outputs to a corresponding level threshold to yield a corresponding comparator output; summing the comparator output with at least one prior instance of the comparator output to yield an aggregated value; comparing the aggregated value to an aggregate threshold to yield an aggregate output; and generating a contact event output if one or more of a first group of the plurality of frequency bin outputs has an associated aggregate output set to a predefined binary value and a predefined minimum number of a second group of the plurality of frequency bin outputs has an associated aggregate output set to a predefined binary value.