{
 "dataset": "english-phoneme-formants",
 "primitive_type": "phoneme",
 "grounding": "extracted",
 "provenance": "AUDITED per-field. The 10 monophthong-vowel F1/F2/F3 (IY,IH,EH,AE,AA,AO,UH,UW,AH,ER) are the MEASURED adult-male /hVd/ means of Peterson & Barney (1952) JASA 24:175-184, verified vs CRAN phonTools::pb52. AX=neutral uniform-tube resonances (Fant, physics). OW steady target = synthesis convention (diphthong). Consonant loci (M,N,NG,L,R,W,Y,Z,DH,V,S,F,HH) and ALL bandwidths + dur/amp = standard formant-synthesis conventions (Klatt 1980 JASA 67:971), engineering defaults NOT field measurements. No numbers invented/LLM-generated.",
 "records": [
  {
   "key": "IY",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 270,
    "f2": 2290,
    "f3": 3010,
    "bw1": 60,
    "bw2": 90,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 130,
    "amp": 100
   }
  },
  {
   "key": "IH",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 390,
    "f2": 1990,
    "f3": 2550,
    "bw1": 70,
    "bw2": 100,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 110,
    "amp": 100
   }
  },
  {
   "key": "EH",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 530,
    "f2": 1840,
    "f3": 2480,
    "bw1": 80,
    "bw2": 100,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 130,
    "amp": 100
   }
  },
  {
   "key": "AE",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 660,
    "f2": 1720,
    "f3": 2410,
    "bw1": 90,
    "bw2": 110,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 150,
    "amp": 100
   }
  },
  {
   "key": "AA",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 730,
    "f2": 1090,
    "f3": 2440,
    "bw1": 90,
    "bw2": 110,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 150,
    "amp": 100
   }
  },
  {
   "key": "AO",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 570,
    "f2": 840,
    "f3": 2410,
    "bw1": 80,
    "bw2": 100,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 140,
    "amp": 100
   }
  },
  {
   "key": "UH",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 440,
    "f2": 1020,
    "f3": 2240,
    "bw1": 70,
    "bw2": 100,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 110,
    "amp": 100
   }
  },
  {
   "key": "UW",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 300,
    "f2": 870,
    "f3": 2240,
    "bw1": 70,
    "bw2": 90,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 140,
    "amp": 100
   }
  },
  {
   "key": "AH",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 640,
    "f2": 1190,
    "f3": 2390,
    "bw1": 80,
    "bw2": 100,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 110,
    "amp": 95
   }
  },
  {
   "key": "ER",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 490,
    "f2": 1350,
    "f3": 1690,
    "bw1": 80,
    "bw2": 100,
    "bw3": 120,
    "voiced": 1,
    "nasal": 0,
    "dur": 140,
    "amp": 95
   }
  },
  {
   "key": "AX",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 500,
    "f2": 1500,
    "f3": 2500,
    "bw1": 80,
    "bw2": 100,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 80,
    "amp": 85
   }
  },
  {
   "key": "OW",
   "features": {
    "manner": "vowel",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 490,
    "f2": 910,
    "f3": 2380,
    "bw1": 80,
    "bw2": 100,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 140,
    "amp": 100
   }
  },
  {
   "key": "M",
   "features": {
    "manner": "nasal",
    "voiced": "yes",
    "nasal": "yes"
   },
   "attributes": {
    "f1": 250,
    "f2": 900,
    "f3": 2200,
    "bw1": 90,
    "bw2": 120,
    "bw3": 180,
    "voiced": 1,
    "nasal": 1,
    "dur": 80,
    "amp": 60
   }
  },
  {
   "key": "N",
   "features": {
    "manner": "nasal",
    "voiced": "yes",
    "nasal": "yes"
   },
   "attributes": {
    "f1": 250,
    "f2": 1700,
    "f3": 2600,
    "bw1": 90,
    "bw2": 120,
    "bw3": 180,
    "voiced": 1,
    "nasal": 1,
    "dur": 80,
    "amp": 60
   }
  },
  {
   "key": "NG",
   "features": {
    "manner": "nasal",
    "voiced": "yes",
    "nasal": "yes"
   },
   "attributes": {
    "f1": 250,
    "f2": 2300,
    "f3": 2700,
    "bw1": 90,
    "bw2": 120,
    "bw3": 180,
    "voiced": 1,
    "nasal": 1,
    "dur": 80,
    "amp": 60
   }
  },
  {
   "key": "L",
   "features": {
    "manner": "approximant",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 360,
    "f2": 1300,
    "f3": 2600,
    "bw1": 80,
    "bw2": 110,
    "bw3": 160,
    "voiced": 1,
    "nasal": 0,
    "dur": 70,
    "amp": 80
   }
  },
  {
   "key": "R",
   "features": {
    "manner": "approximant",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 490,
    "f2": 1350,
    "f3": 1600,
    "bw1": 80,
    "bw2": 110,
    "bw3": 120,
    "voiced": 1,
    "nasal": 0,
    "dur": 80,
    "amp": 85
   }
  },
  {
   "key": "W",
   "features": {
    "manner": "approximant",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 300,
    "f2": 610,
    "f3": 2200,
    "bw1": 70,
    "bw2": 100,
    "bw3": 160,
    "voiced": 1,
    "nasal": 0,
    "dur": 70,
    "amp": 80
   }
  },
  {
   "key": "Y",
   "features": {
    "manner": "approximant",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 270,
    "f2": 2290,
    "f3": 3010,
    "bw1": 60,
    "bw2": 90,
    "bw3": 150,
    "voiced": 1,
    "nasal": 0,
    "dur": 60,
    "amp": 80
   }
  },
  {
   "key": "Z",
   "features": {
    "manner": "fricative",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 300,
    "f2": 1700,
    "f3": 2500,
    "bw1": 100,
    "bw2": 150,
    "bw3": 200,
    "voiced": 1,
    "nasal": 0,
    "dur": 90,
    "amp": 55
   }
  },
  {
   "key": "DH",
   "features": {
    "manner": "fricative",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 300,
    "f2": 1400,
    "f3": 2500,
    "bw1": 100,
    "bw2": 150,
    "bw3": 200,
    "voiced": 1,
    "nasal": 0,
    "dur": 70,
    "amp": 55
   }
  },
  {
   "key": "V",
   "features": {
    "manner": "fricative",
    "voiced": "yes",
    "nasal": "no"
   },
   "attributes": {
    "f1": 300,
    "f2": 1000,
    "f3": 2300,
    "bw1": 100,
    "bw2": 150,
    "bw3": 200,
    "voiced": 1,
    "nasal": 0,
    "dur": 70,
    "amp": 55
   }
  },
  {
   "key": "S",
   "features": {
    "manner": "fricative",
    "voiced": "no",
    "nasal": "no"
   },
   "attributes": {
    "f1": 320,
    "f2": 1700,
    "f3": 2500,
    "bw1": 200,
    "bw2": 200,
    "bw3": 250,
    "voiced": 0,
    "nasal": 0,
    "dur": 110,
    "amp": 45
   }
  },
  {
   "key": "F",
   "features": {
    "manner": "fricative",
    "voiced": "no",
    "nasal": "no"
   },
   "attributes": {
    "f1": 300,
    "f2": 1200,
    "f3": 2400,
    "bw1": 200,
    "bw2": 200,
    "bw3": 250,
    "voiced": 0,
    "nasal": 0,
    "dur": 100,
    "amp": 40
   }
  },
  {
   "key": "HH",
   "features": {
    "manner": "fricative",
    "voiced": "no",
    "nasal": "no"
   },
   "attributes": {
    "f1": 500,
    "f2": 1500,
    "f3": 2500,
    "bw1": 200,
    "bw2": 250,
    "bw3": 300,
    "voiced": 0,
    "nasal": 0,
    "dur": 70,
    "amp": 40
   }
  },
  {
   "key": "SIL",
   "features": {
    "manner": "silence",
    "voiced": "no",
    "nasal": "no"
   },
   "attributes": {
    "f1": 500,
    "f2": 1500,
    "f3": 2500,
    "bw1": 100,
    "bw2": 100,
    "bw3": 100,
    "voiced": 0,
    "nasal": 0,
    "dur": 55,
    "amp": 0
   }
  }
 ]
}