These are fun chat sounds that you can play to liven up any chat. To use just go to your accessories and put this item on (it is invisible, so it won't be seen).
These work with both females and males.
For the trigger words -- for each Chat Sound (1 through 11, no #6) just go to your inventory and right click on the product you put on (i.e. SG Chat Sounds or SG Chat Sounds 2) and click on More Information. It will open up the product description page where you will see the trigger words.
Here are the trigger words:
abort
access
goodbye
wrong
back2
beback
bridge
bye2
awful
troubles
candy
cant
compute
applause
dontgo
ecky
excuse
giggle2
gottagetout
hallelujah
happykids
baby
howdoin
kiss2
laugh1
laugh2
check