Harnessing tactile waves to measure skin-to-skin interactions

Area of Science:

• Biomedical Engineering
• Neuroscience
• Human-Computer Interaction

Background:

• Skin-to-skin touch is a fundamental human interaction.
• Objective quantification of tactile interactions, especially skin-to-skin, remains a significant challenge.
• Existing methods are often invasive or impractical for measuring natural touch.

Purpose of the Study:

• To develop and validate a non-invasive method for quantifying skin-to-skin tactile interactions.
• To explore the use of vibration propagation for measuring touch.
• To assess the influence of touch parameters on the measured signals.

Main Methods:

• Utilized an accelerometer sensor placed on the touching finger to detect vibrations (
• tactile waves
• ).
• Investigated the propagation of vibrations from the point of contact.
• Analyzed the relationship between applied pressure, speed, and signal power.

Main Results:

• The developed method successfully captured signals containing information about skin-to-skin tactile interactions.
• Applied pressure and speed directly influenced the measured signal power.
• Sensor location relative to the touch target did not significantly affect measurements.

Conclusions:

• The proposed vibration-based technique offers a promising, non-invasive, and cost-effective approach to objectively measure skin-to-skin touch.
• This method has potential applications in studying social touch, self-touch, and motor control.
• The technique is robust, easy to implement, and inexpensive.