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Convention Paper

Discrimination of Auditory Source Focus for Musical Instrument Sounds with Varying Low-Frequency Cross Correlation in Multichannel Loudspeaker Reproduction

Authors: Kim, Sungyoung; Martens, William L.; Marui, Atsushi

AES Convention 119 · Paper 6544 · October 2005

Abstract

This study examined the changes in auditory spatial impression associated with changes in signal incoherence within the low-frequency portion of a multichannel loudspeaker reproduction. Multichannel recordings were made in reverberant concert settings of single notes played on musical instruments with significant low-frequency energy. A signal processing method was then developed to manipulate low-frequency correlation
in the pre-recorded material while maintaining high sound quality; subsequent listening tests measured the perceptual effects of varying low frequency correlation on otherwise identical recordings of low-pitch, single-note performances on musical instruments such as the bass violin. For cutoff frequencies ranging from 200 Hz down to 63 Hz, the effects of cutoff frequency on discrimination thresholds were measured for changes in low-frequency correlation using a two-alternative forced-choice task. Listeners also made forced-choice identifications regarding auditory source focus. Results indicated that both discrimination and identification performance was degraded in the presence of the higher-frequency portion of the musical stimuli.

Details

Published in
AES Convention 119
AES Convention
119
Paper number
6544
Publication date
October 6, 2005
Session subject
Multichannel Sound
Affiliation
McGill University (See document for exact affiliation information.)
Type
Convention Paper