Vibrotactile Sensitivity in Active Touch: Effect of Pressing Force

Papetti, Stefano; Järveläinen, Hanna; Giordano, Bruno L.; Schiesser, Sébastien; Fröhlich, Martin

doi:10.1109/toh.2016.2582485

Cited by 42 publications

(42 citation statements)

References 35 publications

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“…That might also contribute to explain the generally lower thresholds that we found for higher forces. In our study, force level was found strongly correlated to contact area, resulting in larger areas for higher forces, which clearly contributed to further lowering perceptual thresholds [43].…”

Section: Discussionsupporting

confidence: 51%

“…Intuitively, a reason for that is that the number of stimulated skin receptors increases with larger contact areas. In the present experiment, the interactive nature of the task resulted in high variability of the contact area [43]. The mean contact areas measured in the experiment were in the range 103-175 mm 2 , contributing to explaining the reported enhanced sensitivity.…”

Section: Discussionmentioning

confidence: 47%

“…In this experiment, vibrotactile perceptual thresholds at the finger were measured for several levels of pressing force actively exerted against a flat rigid surface [43]. Vibration of either sinusoidal or broadband nature and of varying intensity was provided in return.…”

Section: Experiments 1: Vibrotactile Sensitivity Thresholds Under Actimentioning

confidence: 99%

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Perception of Vibrotactile Cues in Musical Performance

Fontana

Papetti

Järveläinen

et al. 2018

Springer Series on Touch and Haptic Systems

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We suggest that studies on active touch psychophysics are needed to inform the design of haptic musical interfaces and better understand the relevance of haptic cues in musical performance. Following a review of the previous literature on vibrotactile perception in musical performance, two recent experiments are reported. The first experiment investigated how active finger-pressing forces affect vibration perception, finding significant effects of vibration type and force level on perceptual thresholds. Moreover, the measured thresholds were considerably lower than those reported in the literature, possibly due to the concurrent effect of large (unconstrained) finger contact areas, active pressing forces, and long-duration stimuli. The second experiment assessed the validity of these findings in a real musical context by studying the detection of vibrotactile cues at the keyboard of a grand and an upright piano. Sensitivity to key vibrations in fact not only was highest at the lower octaves and gradually decreased toward higher pitches; it was also significant for stimuli having spectral peaks of acceleration similar to those of the first experiment, i.e., below the standard sensitivity thresholds measured for sinusoidal vibrations under passive touch conditions.

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Section: Discussionsupporting

confidence: 51%

Section: Discussionmentioning

confidence: 47%

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Perception of Vibrotactile Cues in Musical Performance

Fontana

Papetti

Järveläinen

et al. 2018

Springer Series on Touch and Haptic Systems

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“…In addition, the knowledge gained from the psychophysical studies performed after discrimination experiments can be used for the design of better haptic interfaces. During the design of haptic systems for virtual environment, it is important to consider the resolution of the haptic display to that of the human sensory systems (Tan et al, 1993;Wurdemann et al, 2013;Papetti et al, 2017).…”

Section: Stiffness Discriminationmentioning

confidence: 99%

Wearable Vibrotactile Haptic Device for Stiffness Discrimination during Virtual Interactions

et al. 2017

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In this paper, we discuss the development of cost effective, wireless, and wearable vibrotactile haptic device for stiffness perception during an interaction with virtual objects. Our experimental setup consists of haptic device with five vibrotactile actuators, virtual reality environment tailored in Unity 3D integrating the Oculus Rift Head Mounted Display (HMD) and the Leap Motion controller. The virtual environment is able to capture touch inputs from users. Interaction forces are then rendered at 500 Hz and fed back to the wearable setup stimulating fingertips with ERM vibrotactile actuators. Amplitude and frequency of vibrations are modulated proportionally to the interaction force to simulate the stiffness of a virtual object. A quantitative and qualitative study is done to compare the discrimination of stiffness on virtual linear spring in three sensory modalities: visual only feedback, tactile only feedback, and their combination. A common psychophysics method called the Two Alternative Forced Choice (2AFC) approach is used for quantitative analysis using Just Noticeable Difference (JND) and Weber Fractions (WF). According to the psychometric experiment result, average Weber fraction values of 0.39 for visual only feedback was improved to 0.25 by adding the tactile feedback.

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“…An early prototype was used to study how auditory, tactile, and audio-tactile feedback affect the accuracy of finger pressing force [18]. A [33] more recent psychophysical experiment-described in Sect. 4.2 and making use of a more advanced prototype, described below-investigated how vibrotactile sensitivity is influenced by actively applied finger pressing forces of various intensities.…”

Section: The Touch-boxmentioning

confidence: 99%

Implementation and Characterization of Vibrotactile Interfaces

Papetti

Fröhlich

Fontana

et al. 2018

Springer Series on Touch and Haptic Systems

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While a standard approach is more or less established for rendering basic vibratory cues in consumer electronics, the implementation of advanced vibrotactile feedback still requires designers and engineers to solve a number of technical issues. Several off-the-shelf vibration actuators are currently available, having different characteristics and limitations that should be considered in the design process. We suggest an iterative approach to design in which vibrotactile interfaces are validated by testing their accuracy in rendering vibratory cues and in measuring input gestures. Several examples of prototype interfaces yielding audio-haptic feedback are described, ranging from open-ended devices to musical interfaces, addressing their design and the characterization of their vibratory output.

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Vibrotactile Sensitivity in Active Touch: Effect of Pressing Force

Cited by 42 publications

References 35 publications

Perception of Vibrotactile Cues in Musical Performance

Perception of Vibrotactile Cues in Musical Performance

Wearable Vibrotactile Haptic Device for Stiffness Discrimination during Virtual Interactions

Implementation and Characterization of Vibrotactile Interfaces

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