{
  "$type": "site.standard.document",
  "description": "The air duct (12) comprises a Helmholtz resonator (14) having a damping element (30) which functions as a sound-dissipative material. The Helmholtz resonator is arranged along the depth dimension (T) of the air duct and is set away from the transition region (28) with an abrupt change in the…",
  "path": "/patents/994349",
  "publishedAt": "2013-01-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02M35/1261",
    "ROECHLING AUTOMOTIVE AG & CO [DE]"
  ],
  "textContent": "The air duct (12) comprises a Helmholtz resonator (14) having a damping element (30) which functions as a sound-dissipative material. The Helmholtz resonator is arranged along the depth dimension (T) of the air duct and is set away from the transition region (28) with an abrupt change in the cross-sectional area. The damping element is provided in the transition region or on the side of the neck portion (14a) of the Helmholtz resonator with a smaller cross-sectional area.",
  "title": "Motor vehicle ventilation channel with dampened Helmholtz resonator"
}