| 
		
			| 
			
				| 
				| jonessy |  | Member |  |  |  |  |  | Joined: 22 Dec 2005 |  | Posts: 19 |  | Location: Israel |  |  
 
 |  
			|  |  |  
 
 | 
		
			|  | Hi 
 I am modelling a structure situated outdoors, so besides the ground plane there are no enclosing surfaces.
 To my understanding AURA requires the room to be closed prior to calculating the room response.
 
 I have tried to put the structure inside a pseudo-room with 1.0 alpha "ABSORBER" material, however besides one strong specular reflection (from the ground plane), I am getting some diffuse behaviour at about -50dB level.
 
 What is the correct way/workaround to dealing with an outdoor model?
 
 Are there any perfectly absorbing materials that can be used?
 
 Best regards,
 
 Jon.
 |  |