I am looking for writers/poets who have responded to the experience of
sound in nature.  If possible, I am interested in them responding to
sounds in nature within
the subjects of the Pacific Northwest and forest.

Read Basil Bunting aloud. Pure music. Start with the odes. Here's a
link to his Briggsflats:

http://factoryschool.org/content/sounds/poetry/bunting/bunting.ram

Takes a bit of getting used to but amply rewards those with patience.
In a more American dialect, read Louis Zukofsky aloud. Also pure music
(mixed with mathematical figures...)

Interestingly, Pound dedicated his Guide to Kulchur to these two
"strugglers in the desert" and they all lived together for a spell in
Rapallo, Italia.

READ THEM

Carolyn Kizer wrote some beautiful stuff in the Pacific NW. Logopoeia
(net of words) and melopoeia (net of sound) in Roethke's work complex
and tight, vide "Far Field", his last poems. Thousands of local poets
in and around Seattle. Other than Roethke, not to many huge ones
though.

Of course the greatest onomonapoeia of nature may be found in Homer's
epic Greek when he describes the sea in the Odyssey--polyphloisbius
thallasus (accent on the capitols--po lee FLOYCE be us  thu LA suss).
Say it aloud a few times till you can hear the boyant surf wash onto
shore...

Mark Witucke
Young Poet