{
  "model_type": " laughter_detection",
  "architectures": ["WavLMForLaughterDetection"],
  "task": "audio_classification",
  "num_labels": 2,
  "label_mapping": {"0": "no_laugh", "1": "laughter"},
  "dataset": {
    "name": "standup4ai",
    "num_videos": 221,
    "total_duration_minutes": 540,
    "language": "en",
    "class_balance": {
      "positive": 0.132,
      "negative": 0.868
    }
  },
  "audio_config": {
    "sample_rate": 16000,
    "hop_length": 512,
    "n_fft": 2048,
    "n_mels": 128,
    "fmin": 80,
    "fmax": 8000
  },
  "prosody_features": {
    "dimension": 23,
    "source": "eGeMAPS v02",
    "extraction": "librosa + openSMILE",
    "features": [
      "F0_mean", "F0_std", "F0_slope", "F0_median", "F0_range",
      "pause_duration", 
      "speech_rate", "word_duration_mean", "word_duration_std", "syllable_rate", "phonation_time", "total_time",
      "RMS_energy_mean", "RMS_energy_std", "RMS_energy_range",
      "MFCC1", "MFCC2", "MFCC3",
      "spectral_centroid", "spectral_bandwidth", "spectral_rolloff",
      "voice_activity_ratio",
      "formant_emphasis"
    ]
  },
  "validation": {
    "method": "5-fold_stratified_cv",
    "n_folds": 5,
    "prosody_only_f1": "0.960 ± 0.021",
    "fusion_f1": "0.879 ± 0.034",
    "delta_f1": "-0.081",
    "p_value": 0.024,
    "confidence_interval_95": [-0.152, -0.010]
  },
  "fusion_analysis": {
    "finding": "NEGATIVE_RESULT",
    "cause": "frozen_WavLM_mean_pool_destoys_temporal_cues",
    "regression": "prosody_only_better_than_fusion"
  }
}