Figure 1 - uploaded by Oliver Beren Kaul
Content may be subject to copyright.
HapticHead prototype with 24 actuators around the head and high-density areas on the forehead and chin. Left: Raw prototype; right: integrated into a beanie. First presented in our previous work [16, 17].
Contexts in source publication
Context 1
... [15][16][17] is a vibrotactile display around the head consisting of a bathing cap with a chin strap and a total of 24 vibrotactile actuators (see Fig. 1). It can be used in 3D guidance and localization scenarios in both virtual (VR) and augmented reality (AR) with relatively high precision and low task completion times. This work introduces a notification scenario and (vibro-)tactile patterns (TPs) that are presented at different spatial locations around the ...
Context 2
... prototype consists of a bathing cap with 19 vibration actuators (Precision Microdrives 312-101 [27], 12 mm coin type, 3 V, 75 mA, 12500 rpm, 2.6 g normalized amplitude, 40 ms lag time, and 132 ms rise time) attached on the outside and distributed on the whole surface. The non-stretchable chinstrap hosts an additional five vibration actuators on the inside and can be adjusted to different head sizes using a Velcro fastener (see Figures 1 and 2). This prototype may optionally be integrated into a beanie due to questionable aesthetics of the naked prototype. ...
Context 3
... In the post-study questionnaire ( Fig. 10) participants stated that it was easy and intuitive to recognize TPs on the head and that they found them easy to remember. The smartphone condition scored lower in all of these statements. A Wilcoxon signed-rank test showed that those differences were significant. The participants had mixed opinions on whether the vibration feedback ...
Context 4
... subjective feedback (shown in Fig. 10) suggests that participants rated HapticHead substantially higher than the smartphone in terms of ease, intuitiveness, and recall. This is likely a result of the added location (source) dimension, which was extremely easy to recognize and translated into the overall confidence of being able to correctly identify patterns. The vibration ...
Context 5
... acceptability is another issue of the current HapticHead design. Even though most of the prototype can be hidden under a beanie (see Fig. 1) and a majority of our participants claimed they would use a product like the prototype in real life, the social acceptability of wearing a partly showing tactile interface around the head still has to be evaluated and presumably depends on the situation. While driving a bike social acceptability would probably be higher (e.g., as part ...
Similar publications
This paper describes a method for the automatic rule-based generation of design alternatives for structural connections between timber members. Using this method, a computer program for generating a list of connection options for two timber members was created. Such a computer program may be useful to engineers, architects, and others involved in t...
In the current study, we evaluate the relevance of three physical features when people retrieve the monetary value of banknotes. To this end, three monetary comparison tasks were designed in which in each trial a pair of banknotes were presented and participants selected the one with higher monetary value. In each task, a different banknote feature...
Citations
... advantages for tactile feedback on the head. For example, a strong tactile stimulus on the back of the head can intuitively be recognized as "something is behind me, might be dangerous" [29]. We define intuitive tactile patterns as mostly "self-explanatory" and requiring minimal training, like a single presentation of the available tactile patterns, to feel comfortable with the system and to operate it with minimal interpretation errors. ...
... We showed that our system can be used in 3D guidance and localization scenarios in virtual (VR) and augmented reality (AR) with relatively high precision and low task completion times. We also investigated characteristics of tactile patterns on the head in our prior work [28,29]. The results gave us insights into important aspects of intuitive tactile patterns. ...
... Simultaneously, stimulus location and duration are easier to identify and can thus achieve a higher bandwidth of communicated information. These results were later confirmed for tactile patterns on the head alongside other head-based tactile feedback properties in [29], which influences the design rationale of tactile patterns in the current work. ...
Tactile patterns are a means to convey navigation instructions to pedestrians and are especially helpful for people with visual impairments. This article presents a concept to provide precise micro-navigation instructions through a tactile around-the-head display. Our system presents four tactile patterns for fundamental navigation instructions in conjunction with continuous directional guidance. We followed an iterative, user-centric approach to design the patterns for the fundamental navigation instructions, combined them with a continuous directional guidance stimulus, and tested our system with 13 sighted (blindfolded) and 2 blind participants in an obstacle course, including stairs. We optimized the patterns and validated the final prototype with another five blind participants in a follow-up study. The system steered our participants successfully with a 5.7 cm average absolute deviation from the optimal path. Our guidance is only a little less precise than the usual shoulder wobbling during normal walking and an order of magnitude more precise than previous tactile navigation systems. Our system allows various new use cases of micro-navigation for people with visual impairments, e.g., preventing collisions on a sidewalk or as an anti-veering tool. It also has applications in other areas, such as personnel working in low-vision environments (e.g., firefighters).
We present DrivingVibe, which explores vibrotactile feedback designs around the head to enhance VR driving motion experiences. We propose two approaches that use a 360-degree vibrotactile headband: 1) mirroring and 2) 3D inertia-based. The mirroring approach extends the vibrotactile patterns of handheld controllers to actuate the entire headband uniformly. The 3D inertia-based approach uses the acceleration telemetry data that driving games/simulators export to motion platforms to generate directional vibration patterns, including: i) centrifugal forces, ii) horizontal acceleration/deceleration, and iii) vertical motion due to rough terrain. The two approaches are complementary as the mirroring approach supports all driving games because it does not require telemetry data, while the 3D inertia-based approach provides higher feedback fidelity for games that provide such data. We conducted a 24-person user experience evaluation in both passive passenger mode and active driving mode. Study results showed that both DrivingVibe designs significantly improved realism, immersion, and enjoyment (p<.01) with large effect sizes for the VR driving experiences. For overall preference, 88% (21/24) of participants preferred DrivingVibe, with a 2:1 preference for 3D inertia-based vs. mirroring designs (14 vs. 7 participants). For immersion and enjoyment, 96% (23/24) of participants preferred DrivingVibe, with nearly a 3:1 preference (17 vs. 6 participants) for the 3D inertia-based design.
