Use of digitized speech materials in audiological research

Area of Science:

• Audiology
• Computer Science
• Signal Processing

Background:

• Traditional speech intelligibility testing relies on subjective evaluations and less precise methods.
• Conventional tape recording and calibration techniques present limitations in accuracy and efficiency.

Purpose of the Study:

• To explore the application of computer methods, including digital signal processing and numerical simulations, for objective speech intelligibility testing.
• To demonstrate the advantages of computer-aided procedures in recording, delivering, and manipulating speech stimuli for audiologic research.

Main Methods:

• Utilizing digital signal processing (DSP) and numerical methods for simulating mathematical processes.
• Implementing computer-aided procedures for the recording, delivery, and manipulation of digitized speech stimuli.
• Comparing computer-based methods with conventional tape recording and VU-meter calibration techniques.

Main Results:

• Computer methods significantly increase objectivity in stimulus specification, test control, response evaluation, and interpretation.
• Digitized speech stimuli offer enhanced efficiency and versatility compared to traditional tape recordings.
• Digital recordings provide more reliable speech level specification than conventional peak-level observations.

Conclusions:

• Computer-based approaches, leveraging digital signal processing, revolutionize speech intelligibility testing by enhancing objectivity and precision.
• The adoption of computer-aided procedures in audiologic research leads to more efficient, versatile, and reliable speech material management.
• Digital signal processing offers a superior alternative to conventional methods for speech level calibration and overall test administration.