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Theoretical Study of Near 3D Sound Field Reproduction Based on Wave Field Synthesis

[Philip Lelyveld comment: this is a technical paper]

[NICT Japan]

It is very important to develop near 3D sound field reproduction techniques in order to realize the ultrarealistic communication such as 3D TV and 3D tele-conference. In this report, the principle of the near 3D sound field reproduction technique using wave field synthesis is defined from Kirchhoff-Helmholtz integral equation and two methods (dipole control method and directional point control method) are proposed. The performance of two proposed methods is studied by computer simulation and it is shown that the dipole control method has good performance and that the directional point control method has good performance if the directivity of loudspeakers is unidirectional or shotgun.  …

4 Conclusion

In this paper, near 3D sound field reproduction techniques using wave field synthesis were proposed as methods of achieving ultra- realistic communication in applications such as 3D television and 3D teleconferencing. The principle was derived from the Kirchhoff- Helmholtz integral equation and two methods – dipole control and directional point control methods – were proposed. Computer sim- ulation was used to evaluate the performance of the two methods. The results showed that the dipole control method performed very well, while the directional point control method performed satisfac- torily if the directivity of the loudspeakers was unidirectional and shotgun.

Future work will include manufacturing microphone and loud- speaker arrays based on the proposed methods and evaluating the performance of the systems in a real environment using both acous- tical measurement and subjective assessment.

See the full article here: http://www2.nict.go.jp/univ-com/mcc/people/t-kimura/Acoustics08_1763.pdf

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