"Ormsby filter" meaning in English

{
  "forms": [
    {
      "form": "Ormsby filters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Ormsby filter (plural Ormsby filters)",
      "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A filter of trapezoidal shape specified by four corner frequencies, f1 through f4. The filter rejects below f1 and above f4, is linear from f1 to f2 and from f3 to f4, and is flat from f2 to f3."
      ],
      "id": "en-Ormsby_filter-en-noun-kDkYG5Gh",
      "links": [
        [
          "filter",
          "filter"
        ],
        [
          "trapezoidal",
          "trapezoidal"
        ],
        [
          "frequencies",
          "frequency"
        ]
      ],
      "related": [
        {
          "word": "Butterworth filter"
        }
      ]
    }
  ],
  "word": "Ormsby filter"
}

{
  "forms": [
    {
      "form": "Ormsby filters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Ormsby filter (plural Ormsby filters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Butterworth filter"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A filter of trapezoidal shape specified by four corner frequencies, f1 through f4. The filter rejects below f1 and above f4, is linear from f1 to f2 and from f3 to f4, and is flat from f2 to f3."
      ],
      "links": [
        [
          "filter",
          "filter"
        ],
        [
          "trapezoidal",
          "trapezoidal"
        ],
        [
          "frequencies",
          "frequency"
        ]
      ]
    }
  ],
  "word": "Ormsby filter"
}