5.Low Noise: The coreboard of calcium sulfate panel with density of 1.6~1.7g/cm³. Its superior flatness, density and microporous protection around crystals ensure the very good stability when people walk on. And for the cause of microporous sound-absorbing, the noise is greatly reduced. When people walk on it, nearly no noise generates.( While, steel panel will create vibration or cement crack noise when walking on it.)