On the influence of microphone array geometry on HRTF-based Sound Source Localization
Mojtaba Farmani, Michael Syskind Pedersen, Zheng-Hua Tan, Jesper Jensen
Abstract
The direction dependence of Head Related Transfer Functions (HRTFs) forms the basis for HRTF-based Sound Source Localization (SSL) algorithms. In this paper, we show how spectral similarities of the HRTFs of different directions in the horizontal plane influence performance of HRTF-based SSL algorithms; the more similar the HRTFs of different angles to the HRTF of the target angle, the worse the performance. However, we also show how the microphone array geometry can assist in differentiating between the HRTFs of the different angles, thereby improving performance of HRTF-based SSL algorithms. Furthermore, to demonstrate the analysis results, we show the impact of HRTFs similarities and microphone array geometry on an exemplary HRTF-based SSL algorithm, called MLSSL. This algorithm is well-suited for this purpose as it allows to estimate the Direction-of-Arrival (DoA) of the target sound using any number of microphones and any geometries of the microphone array around the head.
BibTeX
@inproceedings{icassp2015_ontheinfluenceof,
title = {On the influence of microphone array geometry on HRTF-based Sound Source Localization},
author = {Mojtaba Farmani and Michael Syskind Pedersen and Zheng-Hua Tan and Jesper Jensen},
booktitle = {ICASSP 2015},
year = {2015}
}