{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A system for acoustically monitoring a heartbeat includes an acoustic body having a first material in contact with a second material, a density and a propagation speed of sound of the first material is matched with a density and a propagation speed of sound of a human body, and a density and a…",
  "path": "/patents/1329617",
  "publishedAt": "2022-10-20T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "A61B5/024",
    "Toyota Motor Engineering & Manufacturing North America, Inc."
  ],
  "textContent": "A system for acoustically monitoring a heartbeat includes an acoustic body having a first material in contact with a second material, a density and a propagation speed of sound of the first material is matched with a density and a propagation speed of sound of a human body, and a density and a propagation speed of sound of the second material is matched with the density and the propagation speed of sound of the first material, a covering material in contact with a first surface of the acoustic body formed by the first material, and a microphone acoustically coupled to a second surface of the acoustic body formed by the second material.",
  "title": "MICROPHONE WITH STRUCTURAL MATCHED FILTER FOR HEART RATE MEASUREMENT"
}