Sweet spot size of virtual acoustic imaging systems at asymmetric listener locations

作     者：Rose, J Nelson, P Rafaely, B Takeuchi, T 

作者机构：Univ Southampton Inst Sound & Vibrat Res Southampton SO17 1BJ Hants England 

出 版 物：《JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA》 (美国声学会志)

年 卷 期：2002年第112卷第5期

页      面：1992-2002页

核心收录：

学科分类：1002[医学-临床医学] 07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学] 

主　　题：Acoustics Models Theoretical Speech Perception User-Computer Interface Amplifiers Head Human Posture Time Factors 

摘      要：Virtual acoustic imaging systems are effective when the listener s head location is close to the head location assumed when the system was designed. The sweet spot refers to the spatial bubble of head location in which the system is still effective. Some of the previous work investigating the stereo dipole acoustic imaging system shows that for the traditional on-axis listener location the sweet spot is about +/-5 cm for lateral head translations. Larger head movements than this require an update of the virtual acoustic imaging, filters. The interest here is the sweet spot size at off-axis asymmetric listener locations or an understanding of how often one needs to update the filters to ensure the listener perceives a stable virtual image as they move. The examination of the off-axis sweet spot size comprises a theoretical acoustic analysis, computer simulations, and a subjective study. The simulations and subjective evaluation both demonstrate that the width of tolerable lateral head translations is comparable for the symmetric on-axis listener location and asymmetric listener locations that are as far as 25 cm off-axis. (C) 2002 Acoustical Society of America.