Have seen no previous study that used a similar procedure. The popular use of hand-held kazoos in teaching English intonation, however, provides something of the same varied tonal vibrations. Judy Gilbert has been a "Kazoo-enthusiast" for decades, using them in virtually every teacher training workshop. I have been skeptical of their use in the classroom, for a number of reasons, but in teacher training, they definitely have a place.
In haptic pronunciation teaching we use a strong focus on vocal resonance, trying to create as much rich vibration in the bones and sinus cavities as possible to enhance memory for sounds and words, along with controlled gestures, what we term: pedagogical movement patterns. One could easily design an analogous hand-held device that would provide something of the same kind of haptic/tactile input as in the Jung et al. study. Just need to figure out how to get a similar "buzz" on in our EHIEP haptic research!
If you have an idea how to do that, let us know!
Source: Asia -pacific Proceedings of Applied Science and Engineering for Better Human Life, Vo l.5 (2016) pp.55-59,