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    "abbrevTitle": "J SMPE",
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      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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    "abstract": "The question of a suitable measure of harmonic distortion is discussed. The distortion factor employed is defined as the ratio of the effective value of the combined harmonic voltages to the fundamental voltage. A simple rapid method of measuring this ratio is described which has several advantages over earlier methods. Results are given showing the performance of apparatus for the application of this method to the testing of audio frequency amplifier systems",
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      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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    "authors": [
      "W. N. Tuttle"
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
      "source": "parsed",
      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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    "copyright": {
      "holder": "Society of Motion Picture and Television Engineers, Inc.",
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
        "source": "parsed",
        "updated": "2026-05-22T19:19:44.900Z",
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      "year": "1932",
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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    "docId": "10.5594-J05558",
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      "source": "parsed",
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      "version": "smpte-journal-article-nlm@v1"
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    "docLabel": "Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 2, February 1932)",
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      "version": "smpte-journal-article-nlm@v1"
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    "docTitle": "A Method of Measuring Directly the Distortion in Audio Frequency Amplifier Systems",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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    "doi": "10.5594/J05558",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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      "updated": "2026-05-22T19:19:44.900Z",
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    "href": "https://doi.org/10.5594/J05558",
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      "confidence": "high",
      "note": "Constructed from DOI 10.5594/J05558",
      "source": "inferred",
      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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        "updated": "2026-05-22T19:19:44.900Z",
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    "issn$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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    "journalAcronym": "MIJR",
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08182015 BACKFILE JOURNAL FRESH/smptej_18_2/MIJR15Vol18No2.xml)",
      "source": "parsed",
      "updated": "2026-06-16T16:11:59.617Z",
      "version": "smpte-journal-issue-xml@v1"
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    "number": "2",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
      "source": "parsed",
      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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    "pages": "199–206",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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      "updated": "2026-05-22T19:19:44.900Z",
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      "confidence": "high",
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      "source": "parsed",
      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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      "confidence": "high",
      "note": "Normalised to registry \"SMPTE\" convention from NLM publisher-name (The Society of Motion Picture and Television Engineers)",
      "source": "inferred",
      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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      "city": "White Plains, NY",
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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        "updated": "2026-05-22T19:19:44.900Z",
        "version": "smpte-journal-article-nlm@v1"
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      "country": "USA",
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        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08182015 BACKFILE JOURNAL FRESH/smptej_18_2/MIJR15Vol18No2.xml)",
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        "updated": "2026-06-16T16:11:59.617Z",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J05558.xml)",
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      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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        "confidence": "medium",
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    "volume": "18",
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      "confidence": "high",
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