detect sound??

[unkie]

hi, not too sure how to write it out but basically in my mission i want to have a custom radio msg called "Thunder!" that the player can use, 0-0-1 etc...when he hears the challenge "Flash!" from a friendly unit.. if you know what i mean i was wondering how you would do this so that if the player doesnt respond in a certain time the friendly unit will open fire, i.e if it doenst detect the 'thunder' sound being played...

[Knut Erik]

The script should look kinda like this...

_KillTime = 0

#loop
_KillTime = _KillTime + 1
?Respond : goto "End"
_KillTime < 10 : goto "Loop"

YourDude dofire Player
exit

#End
PlaySound "Thunder"
exit