{
  "abstract": "Estimating the range and off-axis angle of the sperm whale biosonar using a single passive hydrophone is a longstanding bioacoustics problem and a prerequisite for unbiased spectral, inter-pulse interval, and behavioral analyses. We propose a Conditional AutoEncoder (CAE) conditioned via Feature-wise Linear Modulation (FiLM), which applies label-derived affine transformations at every decoder resolution to jointly reconstruct time-frequency representations and regress source range and off-axis angle. Several input configurations combining STFT, Wigner–Ville derived cross-representations (MWVD), and complex-valued Wideband Ambiguity Function (WAF) are compared under a two-phase training strategy. Joint reconstruction- and-regression followed by label-conditioned decoder refinement with a frozen image encoder. The best configuration achieves a RMSE of approximately 276 m in range and 14° in off-axis angle, outperforming existing single-hydrophone baselines. The model additionally supports conditional synthesis of physically consistent click representations, corroborating the bent-horn model of sperm whale sound production.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "Nicolas Deloustal"
    },
    {
      "name": "Hervé Glotin"
    },
    {
      "name": "Sébastien Paris"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/212t3q3wwzb1q.bib",
  "cited_by": 0,
  "doi": null,
  "fulltext_url": null,
  "id": "212t3q3wwzb1q",
  "issns": [],
  "landing_url": "https://hal.science/hal-05723856v2",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.info"
    ],
    [
      "hal",
      "0.sdv"
    ],
    [
      "hal",
      "1.info.info-ai"
    ],
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  "openalex": null,
  "pdf_url": "https://hal.science/hal-05723856/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/212t3q3wwzb1q.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:58Z",
      "native_id": "hal-05723856",
      "source": "hal",
      "url": "https://hal.science/hal-05723856v2"
    }
  ],
  "subjects": [
    {
      "field": "biology",
      "origin": "hal:1.sdv.ba",
      "subfield": "zoology-behaviour"
    }
  ],
  "title": "Wigner–Ville-Based Conditional Autoencoder For Biosonar Generation And Joint Range And Off-Axis Estimation With A Single Hydrophone",
  "title_text": "Wigner–Ville-Based Conditional Autoencoder For Biosonar Generation And Joint Range And Off-Axis Estimation With A Single Hydrophone",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:58Z",
  "url": "https://research.draconitic.com/paper/212t3q3wwzb1q",
  "venue": "HAL",
  "versions": []
}