Patent Document ID: 9459732
Application ID: 13379321
Patent Status: 1

Claim One:
1. A method for determining one or more impact locations on an object's surface, the method comprising: receiving acoustic signals from at least two transducers, wherein the acoustic signals correspond to at least one impact location on the object's surface; determining a representative value based on a reconstructed excitation source signal, wherein the reconstructed excitation source signal is based on an algorithmic transformation of (i) the acoustic signals and (ii) predetermined acoustic properties of the object at a given location on the object's surface; removing background noise around a maximum of the reconstructed excitation source signal in a time domain, wherein the removing comprises: transforming the reconstructed excitation source signal in the time domain: determining a time (t max ) at which the transformed reconstructed excitation source signal has a maximum amplitude; filtering a time window around t max to obtain a modified reconstructed source signal corresponding to a given impact at the given location on the object's surface; and transforming the modified reconstructed source signal into a frequency domain; and deciding whether the at least one impact location corresponds to the given location on the object's surface based on a comparison of the representative value and a corresponding value of the acoustic signals.