Impact Localisation Techniques for Tangible Acoustic Interfaces
This paper describes two impact localisation techniques for tangible acoustic interfaces. A rising-edge detection method was used for the time-delay-of-arri val (TDOA) approach and a cross-correlation method for the location-template-matching (LTM) approach. These methods were experimentally investigated using objects of different materials with different types of acoustic sensors. Experimental results have shown their potential for real-time localisation of impacts using common solid surfaces (a steel whiteboard and a hard wood board) and appropriate acoustic sensors for human computer interfaces.
The experimental results show satisfactory reliability for both techniques. The reliability of the LTM approach is associated with the particular template used in the calculations of the correlation coefficients. On the other hand the wave velocity for a given sampling frequency influences the reliability. However, the purpose of this paper was to demonstrate the applicability of the impact localization techniques for computer human interaction using ordinary object materials. Hope this would answer your question. Thank you.
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Hi,
It is a very intersting paper and the way of presenting is very nice. I have a question regarding reliabilaty of these methods compared with other.
Thanks,
Afshin Ghanbarzadeh