Designing haptic effects is a complex, time-consuming process requiring specialized skills and tools. To support haptic design, we introduce HapticGen, a generative model designed to create vibrotactile signals from text inputs. We conducted a formative workshop to identify requirements for an AI-driven haptic model. Given the limited size of existing haptic datasets, we trained HapticGen on a large, labeled dataset of 335k audio samples using an automated audio-to-haptic conversion method. Expert haptic designers then used HapticGen's integrated interface to prompt and rate signals, creating a haptic-specific preference dataset for fine-tuning. We evaluated the fine-tuned HapticGen with 32 users, qualitatively and quantitatively, in an A/B comparison against a baseline text-to-audio model with audio-to-haptic conversion. Results show significant improvements in five haptic experience (e.g., realism) and system usability factors (e.g., future use). Qualitative feedback indicates HapticGen streamlines the ideation process for designers and helps generate diverse, nuanced vibrations.

In this study, we explore the effect of hand posture on haptic experience within the hand. With the wide acceptability of using the hand as an input in the XR, it is important to find out the positive and negative effects of hand postures on the haptic experience. We measured the vibration intensity of the hand using an accelerometer on various hand postures. Our results showed that distinctive hand postures alter the vibrotactile actuator’s tactile feedback across the hand.