ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06

2pPP5. IWAIF model predictions of a profile analysis task.

Mark A. Ericson

Lawrence L. Feth

Dept. of Speech and Hear. Sci., Ohio State Univ., Columbus, OH 43210

Ashok K. Krishnamurthy

Ohio State Univ., Columbus, OH 43210

A profile analysis task was chosen to test the predictions of a multichannel IWAIF model. A 2Q, 2AFC three up-one down, adaptive staircase procedure was incorporated with a 20-dB roving signal level to determine the detection threshold of a 1-kHz target tone in each profile. The masker profiles included 11 adjacent of the 21 possible components ranging from 200 to 5012 Hz. The components of the profile were spaced logarithmically at frequency ratios of 1:1.18 so that no two components fell into any one critical band. The fixed frequency target tone was placed at either the second lowest, middle, or second highest component in each 11 component profile. The IWAIF model predictions are compared with channel theory predictions [Durlach et al., 63--72 (1986)] for listener performance in the profile analysis task. [Work supported by AFOSR.]