Let (R, m) be a Noetherian local ring and M a finitely generat.ed R-module of dimension d. Let X = (x1, . . , xd) be a system of parameters of M. In this paper, the authors give some applications of dd-sequences in the study of certain Koszul homology modules. Recall that the notion of dd-sequence was introduced by N. T. Cuong and D. T. Cuong, which is a distinguished type of d-sequence defined by C. Huneke.