{
  "annotation_id": "da888579-7c89-4d26-8c00-98d3928355d2",
  "date_created": "2026-03-02T18:01:07.416000Z",
  "date_modified": "2026-03-02T18:01:07.416000Z",
  "file_hash": "726150d72250b0ae836e7e81d934af4c77a42d597482a63096678f444be45f28",
  "private": false,
  "record": {
    "abstract": "The full characterization of a stringed musical instrument requires measuring\nthe motion of the strings in at least two dimensions. Traditionally this has\nbeen done using electromagnetic means or by optical transmission. However in\nmany instruments the strings are not made of steel, nor are the strings easily\naccessible on both sides. In this work it is shown that string positions can be\nmeasured by inexpensive optical reflection sensors which neither require\nmetallic strings nor obtrusive access. We have demonstrated a versatile and\nnon-invasive technique for measuring the position of a vibrating string in a 1\nmm^2 area with an accuracy of tens of microns for thin strings, and better than\n0.1 mm for thick ones.",
    "arxiv_id": "physics/0605201",
    "authors": [
      "Chris Waltham",
      "Andrzej Kotlicki"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "title": "A versatile sensor for string motion",
    "url": "https://arxiv.org/abs/physics/0605201"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4e5b597c-30c5-4dd9-8f9c-db691478d542",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}