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Related Experiment Videos

Fast fourier-based DSP algorithm for auditory motion experiments.

Kourosh Saberi1

  • 1Department of Cognitive Sciences, University of California, Irvine, CA 92697-5100, USA. saberi@uci.edu

Behavior Research Methods, Instruments, & Computers : a Journal of the Psychonomic Society, Inc
|January 12, 2005
PubMed
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A novel digital signal-processing technique rapidly generates auditory motion stimuli using dynamic interaural delay changes. This method is highly applicable for real-time sound motion generation across various sound types.

Area of Science:

  • Acoustics
  • Signal Processing
  • Psychoacoustics

Background:

  • Auditory motion perception is crucial for spatial awareness.
  • Generating realistic auditory motion stimuli is complex.
  • Existing methods may lack flexibility for diverse sound types.

Purpose of the Study:

  • To introduce a new digital signal-processing (DSP) technique for rapid auditory motion stimulus generation.
  • To enable the creation of stimuli based on dynamic linear changes in interaural delay.
  • To demonstrate the technique's applicability to various complex and nonstationary sounds.

Main Methods:

  • Utilizes a pair of complementary discrete Fourier transforms (DFTs).
  • Employs differing component spacing within the DFT series.

Related Experiment Videos

  • Implements dynamic linear changes in interaural delay for motion simulation.

    • Main Results:

    • Successfully generates complex auditory motion stimuli in real-time.
    • Allows for arbitrary velocities and starting interaural delays.
    • Applicable to broadband noise, filtered noise, speech, music, and natural sounds.

    Conclusions:

    • The described DSP technique offers a versatile and efficient method for creating auditory motion stimuli.
    • This approach significantly broadens the possibilities for auditory research and applications.
    • The technique's adaptability makes it valuable for studying sound localization and motion perception.