Acoustic Complexity Index (ACI)
Benchmark Value
Scoring Curve
This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context. The scoring engine uses 2 benchmarks together — the OptimalRange form drives the primary score, while 1 guard(s) constrain the result.
Contributing Benchmarks
Evidence & Context
Public Land (National Park): Mean ACI of 135.2 (with a range of 133.0 – 137.4)
Spectrogram complexity based on frequency bins (1–11 kHz), calculated as the sum of relative changes in acoustic intensity across temporal steps, using the mean of the 95th percentile daily values with 95% confidence intervals across public conservation land.
Healthy operational range for acoustic complexity in undisturbed public conservation land in Southeastern Australia.
Reflects the regional target envelope for unmanaged, protected forest ecosystems in Southeastern Australia, providing a pristine benchmark for managed production landscapes.
Sources (1)
A Report on a Community Partnership in Eco-Acoustic Monitoring in Brisbane Ranges
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