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Difference Auralization (DIF-AUR)

The DIF-AUR module separates the distortion by calculating the difference between a test signal xT  and a reference signal xR after adjusting the gain and time delay of both signals. This auralization technique requires no transducer modeling but can also be applied for recording the output of device under test (DUT) in the small signal domain (reference) and in the large signal domain (test).  This is important for auralizing distortion generated by nonlinear cone vibration and impulsive distortion generated by a rubbing voice coil, buzzing doors, loose particles and other defects. 

Features and Benefits

  • Automatic alignment of input signals in time
  • Isolation of difference signal (no model is employed)
  • Scaling of difference signal to enhance or attenuate distortion
  • Automatic leveling of auralization output
  • Export of auralization output to WAVE files
  • Distortion analysis and frequency domain analysis



  • Combines subjective and objective evaluation
  • Isolates all kinds of regular and irregular distortion (also rub & buzz)
  • Exported files may be used for listening tests or perceptual simulation
  • Sensitization of listeners to defect symptom
  • Communication of sound quality to nontechnical colleagues to define target performance
  • Determine critical test signals


dB-Lab software
high quality reproduction system (headphones)


USA: 8,964,996B2

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