The accurate display of frequency dependent polar response data of microphones has largely relied on the use of a defined set of test frequencies and a simple overlay of two-dimensional plots. In recent work, a novel approach to digital displays without fixed frequency points was introduced. Building on this, an enhanced interpolation algorithm is presented, using higher-order spherical harmonics for angular interpolation. The presented approach is compared to conventional interpolation methods in terms of computational cost and accuracy. In addition, a three-dimensional data processing prototype for the creation of interactive, frequency-dependent, three-dimensional microphone directivity plots is presented.

Authors: Ziegler, Jonathan D.; Rau, Mark; Schilling, Andreas; Koch, Andreas
Affiliations: Stuttgart Media University, Stuttgart, Germany; Eberhard Karls University Tübingen, Tübingen, Germany; Center for Computer Research in Music and Acoustics (CCRMA), Stanford University, Palo Alto, CA, USA; Eberhard Karls University Tuebingen, Tuebingen, Germany(See document for exact affiliation information.)
AES Convention: 143 (October 2017) Paper Number: 9877
Publication Date: October 8, 2017
Subject: Transducers

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