Using　3-dimensional　(3D)　sound　sources　as　secondary　sources　in　2-dimensional　(2D)　sound　field　reproduction　is　termed　as　2.5-dimensional　(2.5D)　reproduction.　In　this　paper,　a　method　of　2.5D　sound　field　reproduction　by　using　a　circular　array　of　3D　higher　order　(HO)　loudspeakers　is　proposed.　Based　on　the　spherical　addition　theorem,　interior　sound　field　is　accurately　reproduced　by　the　proposed　method,　which　is　completed　with　a　significantly　attenuated　exterior　sound　field.　Then,　the　proposed　method　is　extended　to　speech　signal　reproduction.　For　speech　signals,　the　approach　provides　a　potential　solution　for　real　world　speech　applications　as　well.　The　test　results　indicate　that　the　proposed　method　restrains　the　exterior　sound　field　energy　effectively　compared　to　the　referenced　method.　Furthermore,　the　quality　of　the　reproduced　speech　signal　within　interest　region　is　close　to　the　origin　signal.　©　2016　IEEE.