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Nonlinear Distortion

Nonlinear Distortion

Harmonic distortion

  • Total harmonic distortion (THD, THD+N)
  • Nth-order component versus frequency and amplitude
  • Hi-2 distortion (weighted low order harmonics)
  • Equivalent input distortion

Intermodulation distortion

  • Nth-order difference-tone and summed-tone intermodulation
  • Total intermodulation distortion (absolute and relative)
  • Amplitude modulation distortion

Multi-tone distortion

  • Relative multi-tone distortion
  • Distortion-noise-ratio

Separated loudspeaker distortion

  • Total distortion in a reproduced audio signal
  • Distortion generated by force factor Bl(x)
  • Distortion generated by stiffness Kmx(x)
  • Distortion generated by inductance Le(x)
  • Distortion generated by inductance Le(i)

Compression of fundamental components

  • Output amplitude versus input amplitude
  • Thermal power compression
  • Nonlinear amplitude compression

DC displacement – dynamic offset the voice coil

  • DC displacement versus frequency
  • DC displacement versus amplitude
  • Asymmetrical probability function pdf
  • Peak-bottom value

Rub & Buzz and impulsive distortion

  • Peak value of higher-order harmonics
  • Rms value of higher-order harmonics
  • Crest-factor of higher-order harmonics
  • Crest-factor versus voice coil displacement
  • Peak value of deterministic component
  • Peak value of random component
  • Isolated defect distortion
  • Noise immunity

Air leakage noise

  • Absolute envelope of modulated noise MOD
  • Relative envelope of modulated noise RMOD
  • Peak value of random distortion RAND
  • Peak value of deterministic distortion DET
  • Crest factor of deterministic distortion CREST
  • Inter-channel delay time
  • Incident angle
  • Mechanical loss factor Qms
  • Port resonance frequency fp
  • Quality factor representing box leakage

Auralization

  • Distortion generated by force factor Bl(x)
  • Distortion generated by stiffness Kmx(x)
  • Distortion generated by inductance Le(x)
  • Distortion generated by inductance Le(i)
  • Voice coil displacement
  • Voice coil temperature
  • Voltage, current and input power