EFFECTS OF PHASE DISTORTION 



559 



the articulation of the more intelh'gible band which was also the least de- 

 layed band. For convenience it is spoken of as the non-delayed band. 



100 



80 



NGN- DELAYED BAND 0-3000~ 

 DELAYED BAND 3000-4500~ 



.04 



.06 



.12 



.16 



.20 



100 



y 80 



O 



NON-DELAYED BAND 0-2000'\j 

 DELAYED BAND 2000-4500~ 



? ' 



.04 



.08 



.12 



.16 



NGN- DELAYED BAND 0-1500'v 

 DELAYED BAND 1500-4500~ 



.20 



100 



80 



NON-DELAYED BAND 750-4500^ 

 DELAYED BAND 0-750~ 



.04 



.08 



.12 



.16 



.20 



TIME OF DELAY IN SECONDS 

 Fig. 5 — Articulation vs. time of delay. 



If the decrease is due primarily to the inability of the delayed 

 range to contribute to articulation for a time equal to the delay inter- 

 val, then if, 



A 1 = sound articulation for zero delay 



A2 = sound articulation of the non-delaved band 



