{"title":"Single-Actuator Vibrotactile Numeric Information Delivery in the Face of Distraction","authors":"Jeffrey R. Blum, J. Cooperstock","doi":"10.1109/WHC.2019.8816082","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816082","url":null,"abstract":"We test ActiVibe, a previously reported method for communicating numeric values between 1 and 10, to determine whether it remains optimal under conditions reflective of more challenging potential real-world use cases. We thus consider vibrotactile communication in conjunction with an audio distractor task, and when conveying not just one, but three numeric values in succession. Results of a user study comparing three different rendering methods indicate that ActiVibe maintains both accuracy and subjective preference advantages vs. two different duration-based methods when conveying a single value, but largely loses these advantages when presenting three sequential values. Under conditions similar to the most difficult ones we test, a more concise duration-only approach may be preferable for some applications, requiring less power consumption and demanding attention for less total time.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"109 1","pages":"461-466"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80309334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The many dimensions underlying perceived softness: How exploratory procedures are influenced by material and the perceptual task*","authors":"Müge Cavdan, K. Doerschner, K. Drewing","doi":"10.1109/WHC.2019.8816088","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816088","url":null,"abstract":"Haptic research has traditionally often equated softness with compliance. However, in a recent study we have suggested that compliance is not the only perceived object dimension underlying what is commonly called softness [1]. Here, we investigate how the different perceptual dimensions of softness affect how materials are haptically explored. Participants freely explored and rated 19 materials on 15 adjectives. The adjectives defined different perceptual tasks by being associated with different softness dimensions. Materials were chosen to represent extreme values separately for each dimension; some materials served as control. Hand movements were recorded on video and subsequently categorized into different exploratory procedures (EPs). A multivariate analysis of variance (MANOVA) yielded significant effects of material, of the perceptual task and of their interaction. Taken together, the results suggest that participants actively adapt their EPs to both the type of material being explored, and to the judged softness dimension, and thus support the notion of different dimensions of softness.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"57 1","pages":"437-442"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79756304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ping-Hsuan Han, Yang-Sheng Chen, Chiao-En Hsieh, Hao-Cheng Wang, Y. Hung
{"title":"Hapmosphere: Simulating the Weathers for Walking Around in Immersive Environment with Haptics Feedback","authors":"Ping-Hsuan Han, Yang-Sheng Chen, Chiao-En Hsieh, Hao-Cheng Wang, Y. Hung","doi":"10.1109/WHC.2019.8816140","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816140","url":null,"abstract":"With the advance of locomotion techniques and virtual reality head-mount display (VR-HMD), the users can explore the virtual world by moving around in the virtual environment. Although VR-HMD can provide immersive visual and auditory feedback, without haptic technologies, the users cannot perceive the multiple tactile sensations from the virtual environment. In this paper, we present Hapmosphere, a multiple tactile display for simulating weather in the immersive environment, which can provide thermal, wind, and humidity feedback simultaneously in a room-scale space. This system consists of a steerable structure and haptic modules rigged on the ceiling, so the users can walk around in the physical area. Furthermore, to evaluate the ability of the tactile display, we propose seven kinds of weathers via design consideration and conduct a user study to investigate the feasibility. In our study, the result has shown the potential of utilizing this haptic technique to enhance the immersive experience. Finally, we highlight the limitations and challenges of designing an immersive environment with haptic feedback.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"39 1","pages":"247-252"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86848217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and Optimization of Squeeze Film Effect based Tactile Display System*","authors":"Shouchun Wang, Xiong Lu, Haohao Sun","doi":"10.1109/WHC.2019.8816147","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816147","url":null,"abstract":"The friction between the fingertip and a plate will be decreased with the squeeze film effect caused by ultrasonic vibration, which will lead to the lateral force changes, and can be used to implement tactile display system through providing the illusions of fine texture surfaces. To improve system performance of this friction based tactile rendering, homogenous and high-amplitude of the tactile plate is needed. This paper presents a method for the optimization of the tactile device configuration, which includes the parameters of geometric dimensioning and the layout of the ultrasonic tactile plate and the piezoelectric actuators. First, the relationship between the various parameters and the vibration mode of the plate is studied through the FEM (finite element method) with ANSYS. Then, a function combining average vibration amplitude μ and its standard deviation σ is proposed for evaluating the various configuration of the tactile display system. Finally, contrast experiments are conducted to verify the efficacy of the proposed method with different system configuration. Furthermore, we demonstrated the proposed method on a tactile display system. The simulation data of optimization method is accordant with the practical experiment results. The proposed optimization method can be applied to general tactile display system designing.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"4 1","pages":"169-174"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79513684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ian Trase, Zhe Xu, Zi Chen, H. Tan, John X. J. Zhang
{"title":"Flexible Electrostatic Transducers for Wearable Haptic Communication*","authors":"Ian Trase, Zhe Xu, Zi Chen, H. Tan, John X. J. Zhang","doi":"10.1109/WHC.2019.8816118","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816118","url":null,"abstract":"We describe a wearable thin-film flexible electrostatic transducer (FET) design capable of delivering haptic stimulation directly to the skin over a broad frequency range. The FET vibrates a curved electrode on a thin film against the skin to generate perceivable displacement. Performance was characterized and studies were carried out to benchmark the comfort and perceptibility on human subjects. Specifically, we conducted a psychophysical experiment to estimate detection thresholds at low (26Hz) and high (260Hz) frequencies and estimated the maximum level at which the stimuli remained comfortable. The displacement response of the FET was highly nonlinear, actuating close to either zero or maximum displacement after a threshold driving amplitude. The 260Hz vibrations were detected at lower displacements than the 26Hz vibrations. In user studies, the detection thresholds indicated that the current FET design achieved a 10dB perceivable stimulation range at both frequencies. No significant difference was found for gender or forearm location. Participants found all low amplitude signals to be comfortable, while at maximum amplitude the low frequency (26Hz) signal was preferred. The present study provides a methodology to quantitatively characterize actuator performance in terms of human perception.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"1 1","pages":"115-120"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88653739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Command Acknowledge through Tactile Feedback Improves the Usability of an EMG-based Interface for the Frontalis Muscle","authors":"L. Franco, G. Salvietti, D. Prattichizzo","doi":"10.1109/WHC.2019.8816133","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816133","url":null,"abstract":"This work presents a study on the effectiveness of tactile feedback for the acknowledgement of a correct command detection in an EMG-based interface for the frontalis muscle. EMG interfaces are increasingly used in assistive robotics to control robots exploiting the repeatability and robustness of the electromyographic signal. However, in many application a feedback about the correct detection of an input is often missed and the user has to wait for the device motion in order to understand if his/her will has been correctly detected by the system. We demonstrate with a user study involving fifteen subjects, that a simple vibrotactile feedback can reduce the muscular effort and the time needed to execute a sequence of action commanded by an EMG device. As a case study, an EMG interface for the frontalis muscle has been used, however proposed results could be extended to EMG interfaces designed for other muscles, e.g., for prosthesis or exoskeleton control.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"29 2 1","pages":"574-579"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81513743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
James S Chilles, W. Frier, A. Abdouni, Marcello Giordano, Orestis Georgiou
{"title":"Laser Doppler Vibrometry and FEM Simulations of Ultrasonic Mid-Air Haptics","authors":"James S Chilles, W. Frier, A. Abdouni, Marcello Giordano, Orestis Georgiou","doi":"10.1109/WHC.2019.8816097","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816097","url":null,"abstract":"Ultrasonic phased arrays are used to deliver midair haptic feedback in both research and commercial applications and strongly rely on the Acoustic Radiation Pressure (ARP) that arises at the air-skin interface. The ARP generated by ultrasonic mid-air haptic feedback technology today is orders of magnitude lower than most forces involved in traditional contact haptic devices, however can be leveraged to produce a rich plethora of perceptible tactile sensations. Therefore, how a viscoelastic structure such as the human skin responds to the ARP is an important research topic that merits further investigation. To that end, we detail herein a methodology to investigate the mechanical response of viscoelastic materials to this type of stimulation. Our research is divided into a laser doppler vibrometry experimental study and a Finite Element Model (FEM) computer simulation of a skin-mimicking phantom slab. Through comparison of experimental and simulation results under different ultrasound stimulation schemes we observe good qualitative and quantitative agreement, thus successfully advancing towards the development of a numerical tool for optimising ultrasonic mid-air haptic stimuli.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"14 1","pages":"259-264"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81984664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Number of Fingers and Grasping Orientation Influence Human Performance During Haptic Rotation","authors":"Kathrin Krieger, Alexandra Moringen, H. Ritter","doi":"10.1109/WHC.2019.8816096","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816096","url":null,"abstract":"This research examines two factors whether they have an influence on human performance during haptic rotation. The first one is the number of fingers used to perform the haptic rotation. The second one is the grasping orientation of the fingers on the rotary knob. Twenty blindfolded participants had to rotate a rotary knob 90 degrees counterclockwise around its own axis. In the first part of the experiment we varied the number of fingers conducting the rotation from two to five. In the second part four different grasping orientations were evaluated: vertical, horizontal, oblique and unfamiliar. To determine the performance, we calculated two measures, the accuracy and the precision based on the rotation angles. The first part of the evaluation showed, that the number of fingers involved in the rotation had a significant influence on the accuracy, while more fingers lead to a better accuracy. Precision was not dependent on the number of fingers. The second evaluation showed that the grasping orientation had no effect on the accuracy. However, there was a significant impact of the grasping position on the precision. The vertical grasping orientation led to a better precision than the horizontal or unfamiliar grasping position.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"20 1","pages":"79-84"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82657955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Perceptual Space of Regular Homogeneous Haptic Textures Rendered Using Electrovibration","authors":"Sunung Mun, Hojin Lee, Seungmoon Choi","doi":"10.1109/WHC.2019.8816143","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816143","url":null,"abstract":"This paper is concerned with the perceptual structure of homogeneous and deterministic haptic textures rendered by an electrovibration display. Textures were modeled using 32 regular tessellations of polygons by changing the polygon, density, edge width, pixel intensity, and image reversal. We conducted a perceptual experiment to estimate the pairwise dissimilarities between the 32 textures using the cluster sorting procedure. We then applied multi-dimensional scaling to the data and obtained a perceptual space that accounted for the effects of the five design variables on texture perception. The subjective impressions of the textures were also rated against eight adjective pairs. We projected the rating results into the perceptual space to find adequate perceptual dimensions for the texture perception. Our results contribute to designing perceptually distinctive textures elicited by electrovibration with an appropriate understanding of their subjective qualities.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"29 1","pages":"7-12"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86531115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PerceptNet: Learning Perceptual Similarity of Haptic Textures in Presence of Unorderable Triplets","authors":"Priyadarshini Kumari, S. Chaudhuri, S. Chaudhuri","doi":"10.1109/WHC.2019.8816141","DOIUrl":"https://doi.org/10.1109/WHC.2019.8816141","url":null,"abstract":"In order to design haptic icons or build a haptic vocabulary, we require a set of easily distinguishable haptic signals to avoid perceptual ambiguity, which in turn requires a way to accurately estimate the perceptual (dis)similarity of such signals. In this work, we present a novel method to learn such a perceptual metric based on data from human studies. Our method is based on a deep neural network that projects signals to an embedding space where the natural Euclidean distance accurately models the degree of dissimilarity between two signals. The network is trained only on non-numerical comparisons of triplets of signals, using a novel triplet loss that considers both types of triplets that are easy to order (inequality constraints), as well as those that are unorderable/ambiguous (equality constraints). Unlike prior MDS-based non-parametric approaches, our method can be trained on a partial set of comparisons and can embed new haptic signals without retraining the model from scratch. Extensive experimental evaluations show that our method is significantly more effective at modeling perceptual dissimilarity than alternatives.","PeriodicalId":6702,"journal":{"name":"2019 IEEE World Haptics Conference (WHC)","volume":"74 1","pages":"163-168"},"PeriodicalIF":0.0,"publicationDate":"2019-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89131438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}