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A detection-theoretic model of echo inhibition
Kourosh Saberi1, Agavni Petrosyan
1Department of Cognitive Sciences, University of California, Irvine, Irvine, CA 92697-5100, USA. kourosh@uci.edu
Psychological Review
|February 6, 2004
Summary
This study models how we perceive sound location from echoes, revealing that echo delay and timing differences impact accuracy. It quantifies information loss in the auditory system when processing these delayed sound cues.
Area of Science:
- Auditory perception
- Psychoacoustics
- Signal processing
Background:
- Echo suppression is a long-studied phenomenon in hearing science.
- Existing models offer limited insight into the mechanisms of echo processing.
Purpose of the Study:
- To develop a model for auditory localization of dual-impulse stimuli.
- To analyze spatial cue processing in echo pulses.
Main Methods:
- Detection-theoretic analysis of auditory localization.
- Utilizing psychometric functions and matching study results.
- Developing a model for perceived echo pulse position.
Main Results:
- Perceived echo position modeled as a normal deviate.
- Expectation is a logistic function of echo delay.
- Variance depends on interaural time difference.
- Quantified information loss in echo events.
Conclusions:
- The model specifies echo pulse perception based on delay and interaural time difference.
- Information loss in the binaural system is linked to echo processing efficiency.