{
  "annotation_id": "5045a7b4-48c7-4bfb-a671-a40c7c2917e1",
  "date_created": "2026-03-02T18:01:10.537000Z",
  "date_modified": "2026-03-02T18:01:10.537000Z",
  "file_hash": "923e88fb50ab4c68f215497ecbb5a3bbd58aa82a8113af670bf8732739f4f6e8",
  "private": false,
  "record": {
    "abstract": "Sound transmission through water-air interface is normally weak because of a\nstrong mass density contrast. Here we show that the transparency of the\ninterface increases dramatically at low frequencies. Rather counterintuitively,\nalmost all acoustic energy emitted by a sufficiently shallow monopole source\nunder water is predicted to be radiated into atmosphere. Physically, increased\ntransparency at lower frequencies is due to the increasing role of\ninhomogeneous waves and a destructive interference of direct and\nsurface-reflected waves under water. The phenomenon of anomalous transparency\nhas significant implications for acoustic communication across the water-air\ninterface, generation of ambient noise, and detection of underwater explosions.",
    "arxiv_id": "physics/0609019",
    "authors": [
      "Oleg A. Godin"
    ],
    "categories": [
      "physics.ao-ph",
      "physics.gen-ph"
    ],
    "doi": "10.1103/PhysRevLett.97.164301",
    "title": "Anomalous transparency of water-air interface for low-frequency sound",
    "url": "https://arxiv.org/abs/physics/0609019"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8281258e-9a49-4504-9fa5-0f12c210b775",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}