A portable acoustical blocking system is disclosed for use with a support comprising a sheet of acoustical blocking material bound by material edge. A reinforcing tape is affixed to the sheet of acoustical blocking material adjacent to the material edge. A plurality of hangers are secured to the sheet of acoustical blocking material and extending through the reinforcing tape and the sheet of acoustical blocking material for hanging the sheet of acoustical blocking material from the support for inhibiting the flow of acoustic energy between the first and second sides of the acoustical blocking material.