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Related Experiment Videos

A concept for a research tool for experiments with cochlear implant users.

L Geurts1, J Wouters

  • 1Laboratoire Experimental ORL, KULeuven, Belgium. Luc.Geurts@uz.kuleuven.ac.be

The Journal of the Acoustical Society of America
|January 6, 2001
PubMed
Summary

APEX (computer Application for Psycho-Electrical eXperiments) is a user-friendly tool for psychophysical experiments and speech coding algorithm research in cochlear implant users. It simplifies experiment programming and stimulus creation without coding knowledge.

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Area of Science:

  • Neuroscience
  • Audiology
  • Computer Science

Background:

  • Psychophysical experiments are crucial for understanding auditory perception.
  • Investigating speech coding algorithms requires specialized tools for stimulus generation and data collection.
  • Cochlear implant research necessitates adaptable platforms for evaluating auditory signal processing.

Purpose of the Study:

  • To introduce APEX, a novel software tool for conducting psychophysical experiments.
  • To enable the investigation of speech coding algorithms using cochlear implant simulations.
  • To provide a flexible platform for auditory research adaptable to various devices.

Main Methods:

  • APEX software facilitates experiment design and stimulus creation without programming expertise.

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  • Custom MATLAB functions generate pulsatile stimuli from speech signals or specified parameters.
  • A digital signal processor (DSP) board delivers stimuli, and responses are collected via PC peripherals.

    • Main Results:

    • APEX allows easy programming of common psychophysical experiments.
    • Stimuli can be generated and delivered efficiently for research purposes.
    • The system is currently implemented for the LAURA cochlear implant but is designed for portability.

    Conclusions:

    • APEX offers a user-friendly solution for psychophysical experiments and speech coding research.
    • The system's design supports adaptability for various auditory research applications.
    • APEX facilitates psycho-acoustical studies through acoustic stimulus presentation via sound cards.