IEEE Trans Haptics. 2019 Oct-Dec;12(4):615-623. doi: 10.1109/TOH.2019.2897303. Epub 2019 Feb 4.
Apparent tactile motion has been shown to occur on many contiguous parts of the body, such as the fingers, forearms, and back. More recently, the illusion has also been elicited on non-contiguous parts of the body, such as between one hand and the other, either when the hands are interconnected or not interconnected by an object (e.g., when holding a tablet or not). Here, we explore the reproducibility of the intermanual tactile illusion of movement between two free hands by employing mid-air tactile stimulation. We investigate the optimal parameters to generate a continuous and smooth motion using two arrays of ultrasound speakers and two stimulation techniques (i.e., static versus dynamic focal point). In the first experiment, we investigate the occurrence of the illusion when using a static focal point, and we define a perceptive model. In the second experiment, we examine the illusion using a dynamic focal point, defining a second perceptive model. Finally, we discuss the differences between the two techniques.
显然，触觉运动在身体的许多连续部位都会产生，例如手指、前臂和背部。最近，这种错觉也在身体的非连续部位产生，例如一只手和另一只手之间，当手通过物体相互连接或不连接时（例如，当手持平板电脑或不手持时）。在这里，我们通过使用空中触觉刺激来探索两只自由手之间的手动触觉运动错觉的可重复性。我们研究了使用两个超声扬声器阵列和两种刺激技术（即静态与动态焦点）产生连续平滑运动的最佳参数（即静态与动态焦点）。在第一个实验中，我们在使用静态焦点时研究了错觉的发生，并定义了一个感知模型。在第二个实验中，我们使用动态焦点检查了错觉，并定义了第二个感知模型。最后，我们讨论了这两种技术之间的差异。
