Spectrogram-based review
Spectrograms provide a visual record of call structure and review decisions.
Approach
A transparent workflow for acoustic evidence.
The aim is not simply to detect calls. It is to produce traceable, interpretable outputs that can support real environmental questions.
1
Acoustic data
Hydrophone recordings, detection exports or partner monitoring datasets.
2
Preparation
Dataset organisation, screening settings, metadata checks and processing assumptions.
3
Detection support
Signal processing, detector outputs or semi-automated candidate-event generation where appropriate.
4
Expert verification
Audio and spectrogram review to confirm calls, reject noise and document uncertainty.
5
Classification
Call types, acoustic structure and repertoire patterns summarised in a consistent framework.
6
Analysis
Temporal, tidal, environmental and acoustic relationships explored quantitatively.
7
Reporting
Clear technical outputs suitable for monitoring, research and environmental assessment.
Acoustic evidence
Visualisation helps communicate acoustic features and classification context.
Scientific restraint
Interpretation is kept separate from overclaiming.
The relationship between underwater seal call types and behaviour remains an active scientific question.
Halicho Marine can investigate relationships between vocal activity, call types and environmental conditions. Conclusions are clearly separated from hypotheses and interpreted in the context of available evidence.