Effects of Physical Bandwidth on Perception of Virtual Gratings
نویسندگان
چکیده
When exploring a virtual environment using a point interaction type force feedback interface, users are forced to adopt a method of ‘temporal encoding’ in order to classify textured surfaces, due to the lack of spatially distributed cues on the fingerpad. Dynamic modelling of haptic interfaces suggests that high spatial frequency information may be attenuated, such that discrimination of stimuli by human users is restricted by the performance of the device. Subjects were asked to judge the orientation of virtual gratings, using a conventional PHANToM interface and one augmented with a dedicated high frequency actuated end-effector. A significant increase in discrimination performance was found for the higher bandwidth interface.
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