Sent in by the always insightful poster Hammer, he explains his theory on the whispers and we posted his unedited thoughts below. Thanks, Hammer.
As most of you are already aware there are whispers that are often heard when apparitions appear, when manifestations of Smokey appear, when Smokey as the black cloud appears and as RGS recently pointed out here sometimes when Others appear. These whispers seem to be from characters that have died on the island (and maybe some that have died off the island). I theorize that when characters die, some or maybe even all of them become Whisperers. Many of the interpretations (done by folks with the needed equipment and accuracy has not been verified) seem to be comments that would or could be made by characters that have died.
For example Boone could have been in the following exchange Sayid and Shannon were in the jungle in “The Other 48 Days”:
“She likes the guy, she likes the guy”
“Your life and time is up”
“Shannon, meet me on the other side”
“Her song” (‘Ana-Lucia’ when reversed)
This second example seems to show that the Whisperers are part of the security system because of the “intruder” statement and alarms going off. Also one of the Whisperers may by Yemi speaking from experience of a plane crash:
**”There may be something, but it may be slack”
“Has he seen us?”
(Alarms go off)
“I’m sorry, I’m sorry, I’m sorry”
“Hide against the bushes”
“Open the door”
“I know what it’s like for a plane to crash”
“Complain, complain, complain”
“I know what you said, but…”
There are many more examples.
Because jaime recently pointed out here that the hieroglyphics may be a hint that Ben summoned Smokey and the fact that the whispers and Smokey often appear separately, I now believe that the Whisperers and Smokey are related in that they are both part of the island’s security system but are separate entities.
Danielle Rousseau at one time referred to the “Monster” as the security system. I feel that Ben sort of proved it by inviting Smokey into camp to stop the attack from the freight folks.
Admittedly, the validity of this theory relies heavily on the accuracy of the interpretations of both the whispers the hieroglyphics transcripts.
Please help improve or debunk.
**Quote taken from lostpedia.com.