2016-08-242016-08-242012-05-08http://hdl.handle.net/10919/72678Vibration or acoustic sound control is achieved using an elastic layer of thermal or insulation material in which a plurality of discrete masses are distributed throughout. The elastic layer may be installed as a pre-formed layer, or be blown into position within a structure where vibration or acoustic sound control is required.application/pdfen-USPatenthttp://pimg-fpiw.uspto.gov/fdd/40/720/081/0.pdf13015633181/29452/742.152/742.13E04B1/7604E04B1/6801E04B1/82E04B2/7409E04B2001/8414E04B2001/8419E04B2001/8461F16F7/10F16F7/104G10K11/165Y10T29/498268172040