Short answer
When designing ultrasonic mid-air haptic feedback, deliberately set the update rate to optimize perceived strength for the specific pattern and context, rather than maximizing it.
- Field
- Human Factors
- Source
- Academic Publication (2019)
- Method
- Experimental study
- Evidence
- Strong effect
Optimizing the perceived strength of ultrasonic mid-air haptic feedback requires careful consideration of the pattern's update rate, with slower rates (below 10 Hz) showing a significant impact on perception, and higher rates not necessarily improving it. This human factors research insight is drawn from a 2019 study published in Academic Publication. Using Experimental study, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing ultrasonic mid-air haptic feedback, deliberately set the update rate to optimize perceived strength for the specific pattern and context, rather than maximizing it.
Ultrasonic Mid-Air Haptics: Update Rate, Not Speed, Dictates Perceived Pattern Strength
Optimizing the perceived strength of ultrasonic mid-air haptic feedback requires careful consideration of the pattern's update rate, with slower rates (below 10 Hz) showing a significant impact on perception, and higher rates not necessarily improving it.
Academic Publication · 2019
Key Findings
- 01The hardware update rate significantly impacts the perceived strength of ultrasonic mid-air haptic patterns.
- 02Higher update rates do not consistently lead to improved pattern perception.
- 03Slower update rates (below 10 Hz) have a notable effect on perceived strength.
- 04The optimal update rate for perceived strength is dependent on the size of the haptic pattern.
Application
Design takeaway
When designing ultrasonic mid-air haptic feedback, deliberately set the update rate to optimize perceived strength for the specific pattern and context, rather than maximizing it.
How to apply
When designing a new interface using ultrasonic mid-air haptics, conduct user testing to determine the most perceptually effective update rate for your specific tactile patterns and their intended sizes. Consider integrating this parameter into your design tools.
Project actions
- 01When prototyping mid-air haptics, experiment with different update rates to see how they affect user perception.
- 02Consider how the size of your haptic pattern might influence the optimal update rate.
Method & Evidence
Variables
Strengths & Limitations
Strengths
- +Investigated a novel aspect of mid-air haptic design (update rate optimization).
- +Conducted user studies to gather perceptual data.
Limitations
The study was conducted with specific hardware and pattern types, so the exact optimal rates may vary for different systems or more complex haptic sensations.
Reliability & validity
The use of user perception as a dependent variable introduces subjectivity, which can affect reliability. Validity is supported by the systematic variation of the independent variable (update rate) and the controlled nature of the experimental setup.
Think critically
How might the cognitive load on the user change with different update rates, and could this influence perceived strength beyond the direct physical sensation?
Design Principles
"Perceptual optimization of haptic feedback requires tuning update rates based on pattern characteristics and user perception, not just hardware limits."
This research challenges the assumption that maximizing hardware capabilities leads to better user experience in mid-air haptics. Designers can leverage this insight to tune haptic feedback for specific applications, potentially improving user comfort and reducing unnecessary computational load.
What This Means for Your Design
When you make mid-air touch effects with sound waves, how fast you update the effect matters for how strong it feels, but making it super fast isn't always best. The best speed depends on how big the effect is.
How to use in your project
- 1.Reference this study when discussing the optimization of haptic feedback parameters in your design project, particularly concerning the trade-offs between hardware capabilities and user perception.
Add to My Project
Quick Cite
Paragraph starter
This research highlights that the update rate of ultrasonic mid-air haptic displays is a critical parameter influencing user perception of pattern strength. Contrary to intuition, higher update rates do not always enhance perceived strength, with slower rates (below 10 Hz) showing a significant impact, and the optimal rate being dependent on pattern size. This suggests that designers should actively tune update rates as a design parameter rather than defaulting to maximum hardware capabilities to achieve desired perceptual outcomes.
Source
Questions About This Research
- What does the research say about ultrasonic mid-air haptics: update rate, not speed, dictates perceived pattern strength?
- When designing ultrasonic mid-air haptic feedback, deliberately set the update rate to optimize perceived strength for the specific pattern and context, rather than maximizing it. Evidence: Academic Publication (2019).
- Why does "Ultrasonic Mid-Air Haptics: Update Rate, Not Speed, Dictates Perceived Pattern Strength" matter for design?
- This research challenges the assumption that maximizing hardware capabilities leads to better user experience in mid-air haptics. Designers can leverage this insight to tune haptic feedback for specific applications, potentially improving user comfort and reducing unnecessary computational load.
- How can designers apply this research?
- When designing ultrasonic mid-air haptic feedback, deliberately set the update rate to optimize perceived strength for the specific pattern and context, rather than maximizing it.
- What were the main findings?
- The hardware update rate significantly impacts the perceived strength of ultrasonic mid-air haptic patterns.. Higher update rates do not consistently lead to improved pattern perception.. Slower update rates (below 10 Hz) have a notable effect on perceived strength.. The optimal update rate for perceived strength is dependent on the size of the haptic pattern.
- What research method was used?
- Experimental study.
- How strong is the evidence?
- Evidence strength is rated Strong effect, based on a 2019 journal from Academic Publication.
- What should I do differently in my next project?
- When designing a new interface using ultrasonic mid-air haptics, conduct user testing to determine the most perceptually effective update rate for your specific tactile patterns and their intended sizes. Consider integrating this parameter into your design tools.
- What are the limitations?
- The study's findings might be specific to the hardware used and the types of patterns tested. Generalizability to all ultrasonic haptic systems and pattern complexities may require further investigation.