Accurate Characterization of Integrated Microphone Arrays for Device--Related Transfer Function Synthesis

Cozens J, Hämäläinen M, Pekkarinen M, Pulakka H. Accurate Characterization of Integrated Microphone Arrays for Device--Related Transfer Function Synthesis. In: Convention Paper. Audio Engineering Society; 2026. Paper 10291. Available from: https://aes.org/publications/elibrary-page/?id=23227

@inproceedings{Cozens2026_23227,
  author = {Cozens, John and Hämäläinen, Matti and Pekkarinen, Mikko and Pulakka, Hannu},
  title = {{Accurate Characterization of Integrated Microphone Arrays for Device--Related Transfer Function Synthesis}},
  note = {Paper 10291},
  year = {2026},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=23227}
}

TY  - CPAPER
TI  - Accurate Characterization of Integrated Microphone Arrays for Device--Related Transfer Function Synthesis
AU  - Cozens, John
AU  - Hämäläinen, Matti
AU  - Pekkarinen, Mikko
AU  - Pulakka, Hannu
M1  - Paper 10291
PY  - 2026
DA  - 2026/05/28
UR  - https://aes.org/publications/elibrary-page/?id=23227
PB  - Audio Engineering Society
LA  - en
AB  - This paper presents an improved method for characterizing integrated microphone arrays for Device-Related Transfer Function (DRTF) synthesis. A probe-array extension of the IMPro technique is introduced to measure all device microphones simultaneously, eliminating unknown timing offsets that arise in asynchronous deviceprobe recordings. A custom four-element probe array and modular test jig were developed to evaluate relative inter-channel propagation delay (RIPD) accuracy across varied microphone-port geometries. Hybrid free-field DRTFs were synthesized by combining IMPro data with Boundary Element Method (BEM) acoustic scattering simulations, demonstrating that the probe-array measurements capture small delay variations essential for precise spatial-audio modeling. The extended IMPro method offers a practical, scalable alternative to anechoic-chamber measurements for modern multi-microphone devices.
ER  -