My understanding is that there is no percussion on the album - just vocals (sometimes electronically manipulated, as in "Desired Constellation") and some piano. Here's your "percussion" (link launches a brief Quicktime video):
http://unit.bjork.com/specials/albums/medu...ulla_rahzel.mov
If you're intrigued by the contributions of Inuit throat singer Tanya Tagaq Gillis, you might want to check this out:
http://www.ubu.com/ethno/soundings/inuit.html
-Jason
The percussion are vocals.
Stick around Jason...