Discrimination of second-format-like frequency transitions
L L Elliott1, M A Hammer, T Carrell
1Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL 60208-3550.
Perception & Psychophysics
|July 1, 1991
Summary
Listeners better discriminate frequency transitions when stimuli share the same starting frequency. Longer stimulus durations (hertz/millisecond) also improve frequency discrimination accuracy.
Area of Science:
- Auditory perception
- Psychoacoustics
- Signal processing
Background:
- Understanding frequency discrimination is crucial for auditory perception.
- Previous research has explored various factors influencing auditory temporal processing.
Purpose of the Study:
- To investigate the discrimination of simulated frequency transitions.
- To compare discrimination performance for transitions sharing common onset versus offset frequencies.
Main Methods:
- Experiment 1: Adaptive procedure to measure just-noticeable differences for increasing frequency transitions.
- Experiment 2: Three-interval, forced-choice procedure to obtain psychometric functions for rising and falling frequency transitions.
Main Results:
- Better discrimination was observed for longer stimuli (hertz/millisecond).
- Transitions sharing the same onset frequency yielded superior discrimination.
- No significant difference was found between rising and falling transition discrimination in Experiment 2.
Conclusions:
- Stimulus onset frequency is a key factor in frequency transition discrimination.
- Stimulus duration and onset frequency characteristics significantly impact auditory temporal processing.
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