Vibrotactile Morse code provides a way to convey words using the sense of touch with vibrations. This can be useful in applications for users with a visual and/or auditory impairment. The advantage of using vibrotactile Morse code is that it is technically easy to accomplish. The usefulness of tactile Morse code also depends on how easy it is to learn to use without providing a visual representation of the code. Here we investigated learning of the vibrotactile the Morse code alphabet without any visual representation of the code and whether the learned letters can immediately be used to recognize words. Two vibration motors were used: one was attached to the left arm (dots) and the other to the right arm (dashes). We gave the participants a learning session of 30 minutes and determined how many letters they had learned. All participants managed to learn at least 15 letters in this time. Directly afterward, they were presented with 2-, 3-, 4-, or 5-letter words consisting of only the letters they had learned. Participants were able to identify words, but correct rates decreased rapidly with word length. We can conclude that it is possible to learn vibrotactile Morse code using only a vibrotactile representation (15 to 24 letters in 30 minutes). After the learning session, it was possible to recognise words, but to increase the recognition rates extra training would be beneficial.

中文翻译：

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学习振动触觉莫尔斯电码字母表

Vibrotactile Morse 电码提供了一种使用带有振动的触觉来传达单词的方法。这在有视觉和/或听觉障碍的用户的应用程序中很有用。使用振动触觉莫尔斯电码的优势在于它在技术上很容易实现。触觉莫尔斯电码的有用性还取决于在不提供代码可视化表示的情况下学习使用的难易程度。在这里，我们研究了在没有任何视觉表示代码的情况下对振动触觉莫尔斯电码字母表的学习，以及学习的字母是否可以立即用于识别单词。使用了两个振动电机：一个连接到左臂（点），另一个连接到右臂（虚线）。我们给参与者一个 30 分钟的学习时间，并确定他们学会了多少个字母。在这段时间内，所有参与者都设法学习了至少 15 个字母。紧接着，他们收到了 2 个、3 个、4 个或 5 个字母的单词，这些单词仅由他们所学的字母组成。参与者能够识别单词，但正确率随着单词长度的增加而迅速下降。我们可以得出结论，仅使用振动触觉表示（30 分钟内 15 到 24 个字母）就可以学习振动触觉莫尔斯电码。学习课程结束后，可以识别单词，但为了提高识别率，额外的训练将是有益的。我们可以得出结论，仅使用振动触觉表示（30 分钟内 15 到 24 个字母）就可以学习振动触觉莫尔斯电码。学习课程结束后，可以识别单词，但为了提高识别率，额外的训练将是有益的。我们可以得出结论，仅使用振动触觉表示（30 分钟内 15 到 24 个字母）就可以学习振动触觉莫尔斯电码。学习课程结束后，可以识别单词，但为了提高识别率，额外的训练将是有益的。