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Theoretical study of impact localisation limits in tangible acoustic interface applications

Theoretical study of impact localisation limits in tangible acoustic interface applications

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Tangible acoustic interface (TAI), the key concept of which is to convert any touchable objects into natural interactive surfaces, is an innovative and exciting idea in human–computer interaction. A key challenge for its development is to accurately locate the tactile interactions. In this reported work, the Cramér-Rao lower bound is utilised to study the theoretical limits of impact localisation using the hyperbolic positioning approach in TAI applications.

References

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      • http://www.taichi.cf.ac.uk.
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      • Rovetta, D., Sarti, A., De Sanctis, G., Fabiani, M.: `Modelling elastic wave propagation in thin plates', Proc. EUSIPCO 2006, September 2006, Florence, Italy.
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      • Yang, B., Scheuing, J.: `Cramer-Rao bound and optimum sensor array for source localization from time differences of arrival', Proc. ICASSP, March 2005, Philadelphia, PA, USA, 4, p. 961–964.
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      • K.C. Ho , M. Sun . Passive source localization using time differences of arrival and gain ratios of arrival. IEEE Trans. Signal Process. , 2 , 464 - 477
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      • H.C. So , Y.T. Chan , F.K.W. Chan . Closed-form formulae for time-difference-of-arrival estimation. IEEE Trans. Signal Process. , 6 , 2614 - 2620
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2009.1260
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