1. 1) J. Blauert, Spatial Hearing, rev. ed. (MIT Press, Cambridge, Mass., 1996).
2. 2) Y. Iwaya, Y. Suzuki and D. Kimura, ``Effects of head movement on front-back error in sound localization,'' Acoust. Sci. & Tech., 24, 322-324 (2003).
3. 3) Y. Suzuki, ``Auditory displays and microphone arrays for active listening,'' 40th Audio Eng. Soc. Int. Conf., Keynote Address 2, p. 4 (2010).
4. 4) E. G. Williams, Fourier Acoustics: Sound Radiation and Nearfield Acoustical Holography (Academic Press, San Diego, 1999).
5. 5) S. Takane, Y. Suzuki and T. Sone, ``A new method for global sound field reproduction based on Kirchhoff's integral equation,'' Acta Acust., 85, 250-257 (1999).