By Jens Ahrens
This publication places the point of interest on serving human listeners within the sound box synthesis even though the method might be additionally exploited in different functions reminiscent of underwater acoustics or ultrasonics. the writer derives a primary formula in response to typical critical equations and the single-layer power technique is pointed out as a useful gizmo on the way to derive a basic answer. He additionally proposes extensions to the single-layer strength strategy which permit for a derivation of particular options for round, planar, and linear distributions of secondary assets. in line with above defined formula it's proven that the 2 tested analytical techniques of Wave box Synthesis and Near-field Compensated better Order Ambisonics represent particular options to the overall challenge that are lined by means of the single-layer strength answer and its extensions.
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Additional resources for Analytic Methods of Sound Field Synthesis
PhD thesis, Delft University of Technology. Bureau International des Poids et Mesures (2006). The international system of units (SI). , & Kress, R. (1998). ). Berlin: Springer. Daniel, J. (2001). Représentation de champs acoustiques, application á la transmission et á la reproduction de scénes sonores complexes dans un contexte multimédia (Representations of sound fields, application to the transmission and reproduction of complex sound scenes in a multimedia context). PhD thesis, Université Paris 6.
7 Radiation Synthesis All of above mentioned loudspeaker-based presentation methods can be interpreted as employing a loudspeaker setup which—partly or fully—encloses the listening area. Recently, outward radiating loudspeaker setups receive more and more attention. Typically, spherical arrangements are used and the primary target is the synthesis of given desired radiation properties (Pollow and Behler 2009; Zotter 2009). Although the work presented in this book can be straightforwardly extended to such radiation synthesis, it is not the primary focus.
6 illustrates the amplitude distribution of the coefficients S˘n0 (ω) jn (ω/c r ) for the interior expansion of a plane wave and a spherical wave. The according coefficients for m = 0 are qualitatively similar. Occasionally in this book, a given sound field will be considered with respect to two different coordinate systems. 2 Representations of Sound Fields 33 operation. This translation of coordinate systems is not straightforward. 1 summarizes one compact representation thereof. Selected alternative representations are outlined in Sects.
Analytic Methods of Sound Field Synthesis by Jens Ahrens