The Resonance team was hired to provide acoustical design services for an apartment building located at 570 21st Street, Oakland, California. The project consisted of a podium level (Type I) with four levels of Type III construction on top. Our services include measurements and analysis of environmental noise intrusion, calculation of required window and exterior door STC ratings. We also provided architectural acoustics input for sound isolation (e.g., party walls, floor-ceiling assemblies), along with mechanical noise/vibration control.