code: def getWhiteNoise():
      signal = essentia.array(np.random.randn(int(N)))
      # Normalization
      signal = signal / max(signal)
  
      return signal
  
file_path: essentia/test/src/qa/hpcp/test_hpcp_generatesignals.py
imports: import random
  import numpy
  from scipy.signal import spectrogram
  import essentia
  from essentia.standard import *
  from test_hpcp_parameters import *
label_desc: Use image node_id 4 for calling a global function with example usage: getWhiteNoise() and returns: signal