I always described the sound as very similar to the sound the pod people made in the 1979 Invasion of the Body Snatchers. (sp. the end with Donald Sutherland doing it) - I don't know why, but for as far back as I can recall that's what they sounded like.
RoflWell played bagpipes!?!![]()
...Or have a wife? Record her as she is shrieking at you to get the lawn done, etc, etc. That could also qualify as the sound a shrieker makes.