I focused more in-depth on the third research category, which is the surface treatment in terms of acoustic qualities. Sound can be another factor that informs surface treatment. By keeping the same openings fort he visual cone, different forms can be applied to the walls to get various acoustic effects, also by using different acoustic materials. So in one room we can have visual connection but no acoustic connection, in another room its the opposite or both at the same time. And this would add up to the tension of prospect and refuge.