Acoustic Ecology 08 & 09
Soundscape & Quiet Atlas
National Park Service acoustic monitoring records sound pressure levels across 33 one-third-octave frequency bands, measuring weather, biophony, and human noise. Time-scrub 24-hour diurnal acoustic clocks from Olympic National Park to the sub-threshold silence of Haleakalā Crater.
Acoustic EcologyNational Park Service Natural Sounds Program
The Soundscape & Quiet Atlas
Quiet Atlas StatusPristine Natural Quiet
Station Code: OLYM-HOH-001 // Elevation 180m
Hoh Rain Forest (Upper River Basin)
Temperate Coniferous Rainforest · 47.8603° N, 123.9348° W
Natural Sound Audibility: 86.4%
Diurnal State: 06:00 // Dawn Chorus & Canopy AwakeningSound Pressure Level: 28.5 dBA
Complex polyphonic bird vocalizations echoing between ancient Sitka spruce trunks, cushioned by damp moss absorption.
Biophony & Geophony (99.2%)
- Pacific wren (Troglodytes pacificus)
- Varied thrush
- Conifer needle water dripping
- Distant Hoh River bedload
Anthrophony (Incursion)
- None detected
Calibrated 1/3-Octave Acoustic Spectrum (20 Hz – 20 kHz):
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1.25k
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Cartologium × Sonologium Spatial Interface
“Cartologium charts the glacial valley topography and precipitation contours of Mount Olympus. Sonologium reveals how dense epiphyte moss blankets act as natural broad-spectrum acoustic absorbers.”