"found sound" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "found object"
      },
      "expansion": "found object",
      "name": "m"
    },
    {
      "args": {
        "1": "en",
        "2": "found art"
      },
      "expansion": "found art",
      "name": "m"
    }
  ],
  "etymology_text": "Compare found object, found art.",
  "forms": [
    {
      "form": "found sounds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "found sound (plural found sounds)",
      "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"
        }
      ],
      "glosses": [
        "Any sound that is recorded from the environment without being specially prepared or induced."
      ],
      "id": "en-found_sound-en-noun-JLDz4HWo",
      "links": [
        [
          "sound",
          "sound"
        ],
        [
          "record",
          "record"
        ],
        [
          "environment",
          "environment"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-aʊnd"
    }
  ],
  "word": "found sound"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "found object"
      },
      "expansion": "found object",
      "name": "m"
    },
    {
      "args": {
        "1": "en",
        "2": "found art"
      },
      "expansion": "found art",
      "name": "m"
    }
  ],
  "etymology_text": "Compare found object, found art.",
  "forms": [
    {
      "form": "found sounds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "found sound (plural found sounds)",
      "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",
        "Rhymes:English/aʊnd",
        "Rhymes:English/aʊnd/2 syllables"
      ],
      "glosses": [
        "Any sound that is recorded from the environment without being specially prepared or induced."
      ],
      "links": [
        [
          "sound",
          "sound"
        ],
        [
          "record",
          "record"
        ],
        [
          "environment",
          "environment"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-aʊnd"
    }
  ],
  "word": "found sound"
}