Journal
IEEE TRANSACTIONS ON HAPTICS
Volume 13, Issue 1, Pages 87-93Publisher
IEEE COMPUTER SOC
DOI: 10.1109/TOH.2020.2965946
Keywords
Phase shift noise; mid-air ultrasound haptics; noise reduction
Categories
Funding
- JSPS [16H06303]
- JST CREST [JPMJCR18A2]
- Grants-in-Aid for Scientific Research [16H06303] Funding Source: KAKEN
Ask authors/readers for more resources
Ultrasound emitted from an array of transducers can produce various tactile sensations by temporally controlling the phase and amplitude of the transducers. However, the controllability in haptic applications has not been well examined. This article clarifies a phase shift of the driving signal causes amplitude fluctuation of emitted ultrasound, even under a constant driving amplitude. We demonstrate theoretically that this problem exists in general resonant systems with various quality factors, and point out that it produces radiation force decrease and audible noise. We also show a method to reduce the fluctuation and quantitatively evaluate the effectiveness. The results provide the measure of the displayed force fluctuation by a fast focus movement and enable silent haptic stimulation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available