Re: OT: Narf has gone looney and wants to GM.
			 
             
			
		
		
		
		The DC to notice a sound at all should increase with either the log or the square root of the distance, or maybe even the log of the square root since I think that's how decibels decrease with distance.  The DC to pinpoint the source location should increase a whole lot faster, though.  The DC to hear thunder might reasonably be -10 a mile away, but no one could possibly pinpoint the exact 5 ft square the lightning bolt hit from that distance, so a flat +20 modifier to the DC to make it DC 10 makes no sense. 
		
	
		
		
		
		
		
		
			
		
		
		
		
		
		
	
		
		
	
	
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