Laureen Polenz’s research while affiliated with Otto-von-Guericke University Magdeburg and other places

... Twenty-five references (80.6%) included system output of which two applied a MM approach (6.5%), and both of them combined visual feedback with audio cues [28,36]. Of the 23 other publications, 22 implemented a visual output (71.0%), whereas 1 reference (3.2%) applied audio cues [17]. The audio feedback was implemented in a way that it indicates successfully recognized gestures in Heinrich et al. [17] and the switching of modes in Nishihori et al. [28] and Sivananthan et al. [36]. ...

Reference:

Multimodal human–computer interaction in interventional radiology and surgery: a systematic literature review