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Sampling strategy for ultrasonic mid-air haptics

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conference contribution
posted on 2023-06-09, 16:13 authored by William Frier, Dario Pittera, Damien Ablart, Marianna Obrist, Sriram Subramanian
Mid-air tactile stimulation using ultrasonics has been used in a variety of human computer interfaces in the form of prototypes as well as products. When generating these tactile patterns with mid-air tactile ultrasonic displays, the common approach has been to sample the patterns using the hardware update rate capabilities to their full extent. In the current study we show that the hardware update rate can impact perception, but unexpectedly we find that higher update rates do not improve pattern perception. In a first user study, we highlight the effect of update rate on the perceived strength of a pattern, especially for patterns rendered at slow rate of less than 10 Hz. In a second user study, we identify the evolution of the optimal update rate according to variations in pattern size. Our main results show that update rate should be designated as additional parameter for tactile patterns. We also discuss how the relationships we defined in the current study can be implemented into designer tools so that designers remain oblivious to this additional complexity.

Funding

SenseX - Sensory Experiences for Interactive Technologies; G1589; EUROPEAN UNION; H2020-ERC-2014-STG-638605

Levitate: Levitation with localised tactile and audio feedback for mid-air interactions; G1987; European Union; 737087

History

Publication status

  • Published

File Version

  • Accepted version

Journal

CHI '19 Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems

Publisher

Association for Computing Machinery

Event name

ACM CHI Conference on Human Factors in Computing Systems 2019

Event location

Glasgow, Scotland, UK

Event type

conference

Event date

4-9 May 2019

ISBN

978145035970

Department affiliated with

  • Informatics Publications

Research groups affiliated with

  • Creative Technology Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-01-30

First Open Access (FOA) Date

2019-01-30

First Compliant Deposit (FCD) Date

2019-01-29

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