Three stories of concrete will cause sound to echo. The way that commercial buildings deal with this is to put in lots of professional acoustic treatments on adjacent walls, floor and ceiling. Think heavy wall to wall tapestries with heavy acoustic panels behind them, thick carpet with deep heavy pads, and acoustic ceilings. Three story concrete walls like this are nonetheless horribly loud. If you really want the look, consult a professional acoustic firm in advance for mitigation strategy and costs.