X0202 4 2007-10-01 0 0000109758 ARBITRON INC ARB 0001196539 MORRIS STEPHEN B 142 WEST 57TH STREET NEW YORK NY 10019 1 1 0 0 Chairman, President and CEO Common Stock 2007-10-01 4 S 0 300 46.50 D 111981 D Common Stock 2007-10-01 4 S 0 300 46.39 D 111681 D Common Stock 2007-10-01 4 S 0 200 46.51 D 111481 D Common Stock 2007-10-01 4 S 0 200 46.48 D 111281 D Common Stock 2007-10-01 4 S 0 100 46.49 D 111181 D Common Stock 2007-10-01 4 S 0 100 46.53 D 111081 D Common Stock 2007-10-01 4 S 0 100 46.33 D 110981 D Common Stock 2007-10-01 4 S 0 100 46.28 D 110881 D Common Stock 2007-10-01 4 S 0 100 46.26 D 110781 D Common Stock 2007-10-01 4 S 0 100 46.22 D 110681 D Common Stock 2007-10-01 4 S 0 100 46.19 D 110581 D Common Stock 2007-10-01 4 S 0 100 46.20 D 110481 D Common Stock 2007-10-01 4 S 0 100 46.18 D 110381 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2006. This is part two of two Form 4 filings disclosing the transaction taking place on October 1, 2007 for the above reporting person. /s/ Timothy T. Smith Attorney in Fact for Stephen B. Morris 2007-10-03