Effects on Localization Performance from Moving the Sound Source in Binaural Reproductions
Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
A well-known problem for reproductions of binaural recordings and simulations using HRTFs other than those of the actual listener is decreased localization performance and increased front-back confusion. Previous studies have indicated that moving the sound source can reduce these problems. The objective of this study was to measure how a unidirectional sound source movement along an orbit in the horizontal plane (achieved by reproducing sounds with a loudspeaker and turning a recording artificial head with a velocity of 5°/s) affects front-back confusion and localization errors. Three factors were studied: 1) movement angle (no movement, 20°, 30° and 40°) 2) acoustic environment (anechoic and reverberant) and 3) type of stimulus (male speech and recurring 840 Hz sinusoidal tones with a Gaussian envelope). Listening tests showed that front-back confusions decreased for 20° and 40° sound source movements, whereas it increased for 30° movement. The localization errors increased with about 5° when moving the sound sources. The front-back confusions and localization error was not affected by the implementation of reverberation. The frontback confusions occurred generally 3% more often for Gaussian tone bursts than speech, whereas the localization errors were equal.
Place, publisher, year, edition, pages
2013. , 39 p.
Binaural, ljudteknik, psykoakustik, HRTF
IdentifiersURN: urn:nbn:se:ltu:diva-46583Local ID: 431f185c-36c5-4e37-b1e7-578d6e8bbdf9OAI: oai:DiVA.org:ltu-46583DiVA: diva2:1019898
Subject / course
Student thesis, at least 15 credits
Validerat; 20130624 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved