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
Private Land: Mean ACI of 133.8 (with a range of 132.8 – 134.9)
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 private land managed under restoration schemes.
Healthy operational range for acoustic complexity in private land under active restoration in Southeastern Australia.
Represents a highly defensible 'best-on-offer' healthy operational target for actively managed forest systems, proving that managed production-adjacent lands can achieve soundscape complexity statistically comparable to protected national parks when managed under ecological stewardship.
Sources (1)
A Report on a Community Partnership in Eco-Acoustic Monitoring in Brisbane Ranges
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