"noise barrier" meaning in English

{
  "forms": [
    {
      "form": "noise barriers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "noise barrier (plural noise barriers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2022 November 16, Mel Holley, “DfT orders actions to keep HS2 costs under control”, in RAIL, number 970, page 15",
          "text": "Over the next three years, the 1.9 [?] cubic metres of spoil extracted will be reused for embankments, noise barriers and landscaping.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Synonym of sound barrier (sense 2)."
      ],
      "id": "en-noise_barrier-en-noun-pyA82yb4",
      "links": [
        [
          "sound barrier",
          "sound barrier#English"
        ]
      ],
      "synonyms": [
        {
          "word": "acoustic barrier"
        },
        {
          "extra": "sense 2",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "sound barrier"
        }
      ]
    }
  ],
  "word": "noise barrier"
}

{
  "forms": [
    {
      "form": "noise barriers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "noise barrier (plural noise barriers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2022 November 16, Mel Holley, “DfT orders actions to keep HS2 costs under control”, in RAIL, number 970, page 15",
          "text": "Over the next three years, the 1.9 [?] cubic metres of spoil extracted will be reused for embankments, noise barriers and landscaping.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Synonym of sound barrier (sense 2)."
      ],
      "links": [
        [
          "sound barrier",
          "sound barrier#English"
        ]
      ],
      "synonyms": [
        {
          "word": "acoustic barrier"
        },
        {
          "extra": "sense 2",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "sound barrier"
        }
      ]
    }
  ],
  "word": "noise barrier"
}