Robustness to head misalignment of virtual sound imaging systems
Takeuchi, T. and Nelson, P.A. (2001) Robustness to head misalignment of virtual sound imaging systems. Journal of the Acoustical Society of America, 109, (3), 958-971. (doi:10.1121/1.1349539).
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When binaural sound signals are presented with two loudspeakers, the listener's ears are required to be in the relatively small region which is under control of the system. Misalignment of the head results in inaccurate synthesis of the binaural signals. Consequently, directional information associated with the acoustic signals is inaccurately reproduced. When the two loudspeakers are placed close together, the spatial rate of change of the generated sound field is much smaller than that generated by two loudspeakers spaced apart. Therefore, the performance of such a system is expected to be more robust to misalignment of the listener's head. Robustness of performance is investigated here with respect to head displacement in three translational and three rotational directions. A comparison is given between systems consisting of two loudspeakers either placed close together or spaced apart. The extent of effective control with head displacement and the resulting deterioration in directional information is investigated in the temporal and spectral domain by analyzing synthesized binaural signals. Subjective localization experiments are performed for cases in which notable differences in performance are expected from the previous analysis. It is shown that the system comprising two loudspeakers that are close together is very robust to misalignment of the listener's head.
|Keywords:||acoustic imaging, acoustic field, hearing, acoustic signal processing|
|Subjects:||T Technology > T Technology (General)
R Medicine > RF Otorhinolaryngology
Q Science > QC Physics
|Divisions:||University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Fluid Dynamics and Acoustics
|Date Deposited:||01 Aug 2005|
|Last Modified:||01 Jun 2011 03:43|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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