Individual differences and left/right asymmetries in auditory space perception I: localization of low-frequency sounds in free field

Sophie Savel 1
1 Sons
LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
Abstract : The number of subjects in studies on human spatial hearing is generally small. Therefore, individual differences and the factors underlying variability are unknown. In this study, we investigated across-listener variability in auditory localization abilities in a group of 50 naïve adults with normal hearing. Targets were trains of low-frequency noise bursts presented to 1 of 12 hidden speakers in the azimuthal plane. We observed less across-listener variability in the variance of individual responses but more in the rootmean- square and signed errors, which tended to increase with target angle. One third of the listeners demonstrated systematically smaller signed errors with left-sided targets than with right-sided ones. These asymmetries were observed less frequently in left-handers and females than in right-handers and males. Performance was not correlated with age. About 4 of 6 listeners trained with sensory feedback showed no reduction of asymmetries with training but rather showed a reduction in errors on their ‘‘best” side. Across-listener variability in the asymmetry of brain organization, notably linked to handedness or gender, is discussed.
Type de document :
Article dans une revue
Hearing Research, Elsevier, 2009, 255 (1-2), pp.142-154. <10.1016/j.heares.2009.06.013>
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https://hal.archives-ouvertes.fr/hal-00460006
Contributeur : Sophie Savel <>
Soumis le : vendredi 26 février 2010 - 08:24:56
Dernière modification le : mercredi 4 mai 2016 - 14:14:51

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Sophie Savel. Individual differences and left/right asymmetries in auditory space perception I: localization of low-frequency sounds in free field. Hearing Research, Elsevier, 2009, 255 (1-2), pp.142-154. <10.1016/j.heares.2009.06.013>. <hal-00460006>

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