I measured 112dBA peaks at the pipers' ears and 110dBA 2 feet over the
side drum heads.

That's bad, but not as bad as a friend of mine measured. When his band was at
its peak, the sound level over his drums was 140dB (admittedly with a
fast-response meter).

By the way, my friend's band is better known as the St. Louis Symphony
Orchestra. I forget what he said they were playing; Stravinsky or Mahler, I
think.

Peace,
Paul