{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "The present invention relates to a sound absorber and a wheel having the same. The sound absorber (10) is configured as a rectangular hexahedral box and forms a porous double-layer Helmholtz resonance sound absorbing structure, at the same time, the sound absorber (10) in the form of a box forms a…",
  "path": "/patents/1422175",
  "publishedAt": "2023-07-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60B19/00",
    "CITIC DICASTAL CO LTD [CN]"
  ],
  "textContent": "The present invention relates to a sound absorber and a wheel having the same. The sound absorber (10) is configured as a rectangular hexahedral box and forms a porous double-layer Helmholtz resonance sound absorbing structure, at the same time, the sound absorber (10) in the form of a box forms a structural resonance sound absorbing device itself, and the first-order natural mode frequency of the device is identical to that of a wheel air chamber (30). When the box-type sound absorbing structure is assembled in a wheel, double functions of absorbing acoustic resonance of the wheel air chamber under the organic combination of Helmholtz resonance sound absorption and structural resonance sound absorption can be realized.",
  "title": "SOUND ABSORBER AND WHEEL HAVING SAME"
}