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The research leading to these results has received funding from the following entities: Spanish Ministry of Economy and Competitiveness under grant TIN2017-83132-C2-1-R (VIANA), as well as from the European Union's Horizon 2020 Framework Programme for Research and Innovation under the Specific Grant Agreements No. 785907 (Human Brain Project SGA2) and 945539 (Human Brain Project SGA3).

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Improving the Discriminability of Haptic Icons: The Haptic Tuning Fork

Publicado en:Applied Sciences-Basel. 11 (18): 8772- - 2021-09-01 11(18), DOI: 10.3390/app11188772

Autores: Raya, Laura; Boga, Sara A; Garcia-Lorenzo, Marcos; Bayona, Sofia

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Resumen

Technological advances enable the capture and management of complex data sets that need to be correctly understood. Visualisation techniques can help in complex data analysis and exploration, but sometimes the visual channel is not enough, or it is not always available. Some authors propose using the haptic channel to reinforce or substitute the visual sense, but the limited human haptic short-term memory still poses a challenge. We present the haptic tuning fork, a reference signal displayed before the haptic information for increasing the discriminability of haptic icons. With this reference, the user does not depend only on short-term memory. We have decided to evaluate the usefulness of the haptic tuning fork in impedance kinesthetic devices as these are the most common. Furthermore, since the renderable signal ranges are device-dependent, we introduce a methodology to select a discriminable set of signals called the haptic scale. Both the haptic tuning fork and the haptic scale proved their usefulness in the performed experiments regarding haptic stimuli varying in frequency.

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