Speech Tactons Improve Speech Warnings for Drivers

Politis, I., Brewster, S. and Pollick, F. (2014) Speech Tactons Improve Speech Warnings for Drivers. In: Automotive'UI 14, Seattle, WA, USA, 17-19 Sept 2014, pp. 1-8. ISBN 9781450332125 (doi:10.1145/2667317.2667318)

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Abstract

This paper describes two experiments evaluating a set of speech and tactile driver warnings. Six speech messages of three urgency levels were designed, along with their tactile equivalents, Speech Tactons. These new tactile warnings retained the rhythm of speech and used different levels of roughness and intensity to convey urgency. The perceived urgency, annoyance and alerting effectiveness of these warnings were evaluated. Results showed that bimodal (audio and tactile) warnings were rated as more urgent, more annoying and more effective compared to unimodal ones (audio or tactile). Perceived urgency and alerting effectiveness decreased along with the designed urgency, while perceived annoyance was lowest for warnings of medium designed urgency. In the tactile modality, ratings varied less as compared to the audio and audiotactile modalities. Roughness decreased and intensity increased ratings for Speech Tactons in all the measures used. Finally, Speech Tactons produced acceptable recognition accuracy when tested without their speech counterparts. These results demonstrate the utility of Speech Tactons as a new form of tactile alert while driving, especially when synchronized with speech.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Pollick, Professor Frank and Brewster, Professor Stephen
Authors: Politis, I., Brewster, S., and Pollick, F.
College/School:College of Science and Engineering > School of Computing Science
College of Science and Engineering > School of Psychology
ISBN:9781450332125
Copyright Holders:Copyright © 2014 The Authors
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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