Modelling of Confusions in Aircraft Call Signs

Cox, S. J. and Vinagre, L. (2004) Modelling of Confusions in Aircraft Call Signs. Speech Communication, 42 (3-4). pp. 289-312. ISSN 0167-6393

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Abstract

Air-traffic has grown rapidly in the last twenty years and concern has been mounting about the safety implications of mis-recognition of call-signs by both pilots and air-traffic controllers. This paper presents the results of a preliminary study into perceptual (i.e. non-cognitive) confusions in two closed vocabularies of the type used as aircraft call-signs. Conventional methods of subjective and objective testing were found to be unsuitable for our aim of predicting potential confusions within a vocabulary. Hence a method for modelling confusion probability in a closed vocabulary at a certain signal-to-noise ratio has been developed. The method is based on the use of a phoneme confusion matrix and a technique for comparing phoneme strings. The method is presented and results are given. These suggest that the behaviour of the model is plausible, and a comparison of its predictions with a set of real confusions showed a correct prediction of position of confusion in three-word phrases. The predictions of the model need to be verified by subjective testing before it can be deployed in a system that designs low-confusability call-signs, which is the ultimate goal of the research.

Item Type: Article
Faculty \ School: Faculty of Science > School of Computing Sciences
Related URLs:
Depositing User: Vishal Gautam
Date Deposited: 13 Jun 2011 11:36
Last Modified: 24 Jul 2019 16:34
URI: https://ueaeprints.uea.ac.uk/id/eprint/21947
DOI: 10.1016/j.specom.2003.09.006

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