We should be asking that question ... what exactly is it that you want to achieve? I listened to the audio file and I'm still very confused what it is that you want.
If you can't explain it well in English, send me a PM in Dutch or something to explain it better.
EDIT: Ok just recieved a PM, and I think I get it now. :P
If I understood correctly, there used to be a problem with a specific sound on certain events, which Blizzard fixed. But since the "1GB Burning Crusade patch" (I assume he means the 3.0 patch with this), the sound has now come back.
I think the sound is a clicking noise, but I'm not sure of this ...
Anyway, I don't really know how to fix this. but have you considered the possibility that this may be normal behavior, and you had an addon that made the sound go away, but the latest patch broke that addon?
That's all I can think of really.