In a landmark project of Seattle, CollinsWoeman and Intellectual Ventures applied Innovative Building Technologies (IBT) to create a new breed of apartment. Located in the University District, 47 + 7 is difficult to miss. From the outside building envelope to the interior floor and wall assemblies, this project represents the future in multi-family residential design. SSA Acoustics was called to evaluate and make recommendations on assemblies built from non-traditional materials to achieve above-IBC performances in acoustics. Through a process of analytical evaluation and testing walls and floor/ceiling assemblies were created achieving levels to a HUD Grade II standard, representing a milestone in acoustical design of multi-family residential.