ASA 124th Meeting New Orleans 1992 October

1aPP10. The correlation between responses under monaural and binaural conditions.

R. H. Gilkey

Dept. of Psychol., Wright State Univ., Dayton, OH 45435

Armstrong Lab., AL/CFBA, Wright--Patterson AFB, Dayton, OH 45433-6573

Gilkey et al. [J. Acoust. Soc. Am. 78, 1207--1219 (1985)] compared ``monaural'' (NoSo) and ``binaural'' (NoS(pi)) performance in a reproducible noise masking task. Despite a large masking level difference, the responses to individual noise samples under the NoSo and NoS(pi) conditions were highly correlated (p<<0.001). Isabelle and Colburn [J. Acoust. Soc. Am. 89, 352--359 (1991)], on the other hand, found correlations that were weak, and sometimes negative. Gilkey et al. used wideband masking noise, whereas Isabelle and Colburn used narrow-band maskers. On that basis, Isabelle and Colburn argued that the correlation observed by Gilkey et al. might be more appropriately attributed to similarities in across-critical-band processing, rather than to similarities in within-critical-band processing. The present study examined both wideband and narrow-band maskers and found highly significant correlations between monaural and binaural performance for both maskers (p<<0.005). [Work supported by NIH-DC-000786 and AFOSR-91-0289.]