Ulla or Aloo?

[deadsword]

I been reading the novel lately and i am still in book one. Good read thus far, wish I had read it along time ago but I am curious about what sounds the tripods make? For months i been hearing Ullaaaaaaaaaaaa and I got to the part where the narator first sees the martian machine and describes the sound as Aloo. I am a bit confused about it. I cannot remember if the term or sound of Ullah was described yet this far into the novel but maybe it was in the first chapters when the martians used had used the heat ray.

[Poyks]

You can look here;

robk.proboards13.com/index.cgi?action=display&board=book&thread=1141536188&page=1

I hope that's of some help. :-)