Interpolation and Display of Microphone Directivity Measurements Using Higher Order Spherical Harmonics

Ziegler JD, Rau M, Schilling A, Koch A. Interpolation and Display of Microphone Directivity Measurements Using Higher Order Spherical Harmonics. In: AES Convention 143. Audio Engineering Society; 2017. Paper 9877. Available from: https://aes.org/publications/elibrary-page/?id=19274

@inproceedings{Ziegler2017_19274,
  author = {Ziegler, Jonathan D. and Rau, Mark and Schilling, Andreas and Koch, Andreas},
  title = {{Interpolation and Display of Microphone Directivity Measurements Using Higher Order Spherical Harmonics}},
  booktitle = {AES Convention 143},
  note = {Paper 9877},
  year = {2017},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19274}
}

TY  - CPAPER
TI  - Interpolation and Display of Microphone Directivity Measurements Using Higher Order Spherical Harmonics
AU  - Ziegler, Jonathan D.
AU  - Rau, Mark
AU  - Schilling, Andreas
AU  - Koch, Andreas
T2  - AES Convention 143
M1  - Paper 9877
PY  - 2017
DA  - 2017/10/06
UR  - https://aes.org/publications/elibrary-page/?id=19274
PB  - Audio Engineering Society
LA  - en
AB  - 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.
ER  -