code: def hz_to_mel(freqs: torch.Tensor):
      """
      Converts a Tensor of frequencies in hertz to the mel scale.
      Uses the simple formula by O'Shaughnessy (1987).
  
      Args:
          freqs (torch.Tensor): frequencies to convert.
  
      """
      return 2595 * torch.log10(1 + freqs / 700)
  
file_path: julius/julius/core.py
imports: import math
  import typing
  import torch
  from torch.nn import functional
label_desc: Use image node_id 3 for calling a global function with example usage: hz_to_mel(freqs) and returns: unknown