Analysis on the Timbre of Virtual Auditory Display through a Pair of Loudspeakers
In virtual auditory display through a pair of loudspeakers,a perfect cross-talk cancellation can ensure that reproduced pressures at two ears exactly equal to these generated by a real source. But the performance of crosstalk cancellation is position-dependent. When the listeners head deviates from an optimum position, the cross-talk cancellation is smeared and the pressures at the two ears are altered. In present work, Moores loudness model was used to analyze the robustness of binaural loudness level spectra (BLLS) against the lateral movement of the head. Results show that the BLLS is extremely sensitive to the variations in the head position. A deviation of ± 0.01～± 0.02 m can cause an obvious change in BLLS, especially a boost of BLLS in mid and high frequencies. In conventional stereophonic reproduction, however, the variation of BLLS with head position is less obvious. Therefore, the present work indicates that in virtual auditory display through a pair of loudspeakers, the BLLS is not robust against the slight variations in head position which will cause timbre artifacts.
Bo-sun Xie
Acoustic Lab.,Physics Dept.,School of Science,South China University of Technology,Guangzhou,510641,China
国际会议
The 10th Western Pacific Acoustics Conference(第十届西太平洋声学会议WESPAC X)
北京
英文
1-8
2009-09-21（万方平台首次上网日期，不代表论文的发表时间）