ARA contemporary waveform review
Current guarded 5–100 Hz nominal-pressure products for the available 20–22 and 24–26 August holdings. Heatmaps show 11 non-overlapping nominal decidecade bands. Blank cells touch a real gap or a 32.768 s response-filter edge and were not filled.
Observed soundscape description only. These plots do not detect a ship, estimate direction, attribute a source, or test a prediction.
Combined hydrophone view
Power-like values are averaged across available hydrophones in linear units, then converted to decibels.
Hydrophone views
Selected hour and band
Persistent multi-hydrophone tone families
Point area shows minimum within-hydrophone persistence; colour shows the weakest supporting-hydrophone prominence. Select a point for the exact evidence; technical identifiers can be expanded separately.
Processing and standing
Calibration: calibration.nominal_pressure.band_limited_inverse_5_100hz.v1, 16,385-tap zero-phase inverse, cosine tapers at 3/5/100/112.201845 Hz, 8,192 samples invalid at each contiguous-run edge. Spectra: periodic Hann Welch, 8,192 samples, 4,096 overlap, linear detrend, density scaling. Bands use exact base-10 edges around nominal centres 10–100 Hz. H03 uses the declared official complex FAP under its bounded temporal extension; H01, H08, and H10 use their usable nominal StationXML responses.