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This paper is devoted to the identification of the unknown smooth coefficientcentering the hyperbolic equationc(x)∂t2u−Δu=0in a bounded smooth domain inℝdfrom partial (on part of the boundary) dynamic boundary measurements. In this paper, we prove that the knowledge of the partial Cauchy data for this class of hyperbolic PDE on any open subsetΓof the boundary determines explicitly the coefficientcprovided thatcis known outside a bounded domain. Then, through construction of appropriate testdoi:10.1155/2010/561395 fatcat:gypgu7jf4zbqhepdhodlgefoha