| Paper ID | AUD-27.6 |
| Paper Title |
MISALIGNMENT RECOGNITION IN ACOUSTIC SENSOR NETWORKS USING A SEMI-SUPERVISED SOURCE ESTIMATION METHOD AND MARKOV RANDOM FIELDS |
| Authors |
Gabriel F Miller, Andreas Brendel, Walter Kellermann, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Germany; Sharon Gannot, Bar-Ilan University, Israel |
| Session | AUD-27: Acoustic Sensor Array Processing 1: Array Design and Calibration |
| Location | Gather.Town |
| Session Time: | Friday, 11 June, 11:30 - 12:15 |
| Presentation Time: | Friday, 11 June, 11:30 - 12:15 |
| Presentation |
Poster
|
| Topic |
Audio and Acoustic Signal Processing: [AUD-ASAP] Acoustic Sensor Array Processing |
| IEEE Xplore Open Preview |
Click here to view in IEEE Xplore |
| Virtual Presentation |
Click here to watch in the Virtual Conference |
| Abstract |
In this paper, we consider the problem of acoustic source localization by acoustic sensor networks (ASNs) using a promising, learning-based technique that adapts to the acoustic environment. In particular, we look at the scenario when a node in the ASN is displaced from its position during training. As the mismatch between the ASN used for learning the localization model and the one after a node displacement leads to erroneous position estimates, a displacement has to be detected and the displaced nodes need to be identified. We propose a method that considers the disparity in position estimates made by leave-one-node-out (LONO) sub-networks and uses a Markov random field (MRF) framework to infer the probability of each LONO position estimate being aligned, misaligned or unreliable while accounting for the noise inherent to the estimator. This probabilistic approach is advantageous over naive detection methods, as it outputs a normalized value that encapsulates conditional information provided by each LONO sub-network on whether the reading is in misalignment with the overall network. Experimental results confirm that the performance of the proposed method is consistent in identifying compromised nodes in various acoustic conditions. |
