code: def _true_voiced_frames(true_t, true_f, est_t, est_f):
      return (est_f != 0) & (true_f != 0)
  
file_path: fairseq/examples/speech_synthesis/utils.py
imports: import numpy
  import torch
  from scipy.interpolate import interp1d
  import torchaudio
  from fairseq.tasks.text_to_speech import batch_compute_distortion, compute_rms_dist
label_desc: Use image node_id 5 for calling a global function with example usage: _true_voiced_frames(true_t, true_f, est_t, est_f) and returns: unknown