Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Interaural correlation discrimination with spectrally-remote flanking noise: Constraints for models of binaural unmasking

Culling, John ORCID:, Hodder, K. I. and Colburn, H. S. 2003. Interaural correlation discrimination with spectrally-remote flanking noise: Constraints for models of binaural unmasking. Acta Acustica united with Acustica 89 (6) , pp. 1049-1058.

Full text not available from this repository.


Two experiments were used to discriminate between models of binaural unmasking. In each, interaural correlation sensitivity was measured for one-ERB-wide bands of noise centered at 500 Hz in the presence of remote flanking bands of correlated or anticorrelated noise. The flanking bands were separated from the target band on each side by spectral notches of 0, 1, 2, or 3 ERBs. Notches of 1 ERB or more produced smaller d′s for comparisons of widely differing positive and negative correlations (e.g. +0.8 and −1) than for smaller differences, particularly values compared to zero. These results are markedly at odds with most models of binaural processing. Experiment 1 used a 2I-2AFC loudness-discrimination task without feedback for 11 pairs of target-band correlation values. Fitted continuous cumulative d′ functions invariably showed peaks at a target-band correlation close to zero when notches were present; zero correlation sounded loudest. In experiment 2, 36 naïve listeners compared pairs of widely differing correlations in a 3I-2AFC task with feedback and 2-ERB notches. For 12 listeners who displayed a substantial sensitivity (mean d′ > 1), the four comparisons involving zero gave large d′ values, but comparison of large positive and negative correlations generally gave d′ values of less than one. Only one listener achieved a d′ greater than one for discriminating correlations of 0.8 and −1, indicating that this near-maximal change in interaural correlation is remarkably difficult to detect.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Publisher: S. Hirzel
ISSN: 1610-1928
Last Modified: 21 Oct 2022 08:59

Citation Data

Cited 6 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item