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Acustico: Surface Tap Detection and Localization using Wrist-based Acoustic TDOA Sensing

Published: 20 October 2020 Publication History

Abstract

In this paper, we present Acustico, a passive acoustic sensing approach that enables tap detection and 2D tap localization on uninstrumented surfaces using a wrist-worn device. Our technique uses a novel application of acoustic time differences of arrival (TDOA) analysis. We adopt a sensor fusion approach by taking both 'surface waves' (i.e., vibrations through surface) and 'sound waves' (i.e., vibrations through air) into analysis to improve sensing resolution. We carefully design a sensor configuration to meet the constraints of a wristband form factor. We built a wristband prototype with four acoustic sensors, two accelerometers and two microphones. Through a 20-participant study, we evaluated the performance of our proposed sensing technique for tap detection and localization. Results show that our system reliably detects taps with an F1-score of 0.9987 across different environmental noises and yields high localization accuracies with root-mean-square-errors of 7.6mm (X-axis) and 4.6mm (Y-axis) across different surfaces and tapping techniques.

Supplementary Material

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    cover image ACM Conferences
    UIST '20: Proceedings of the 33rd Annual ACM Symposium on User Interface Software and Technology
    October 2020
    1297 pages
    ISBN:9781450375146
    DOI:10.1145/3379337
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    Published: 20 October 2020

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    Author Tags

    1. passive acoustic
    2. tap detection and localization
    3. time differences of arrival (tdoa) analysis
    4. wrist-based sensing

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    • (2024)TouchInsight: Uncertainty-aware Rapid Touch and Text Input for Mixed Reality from Egocentric VisionProceedings of the 37th Annual ACM Symposium on User Interface Software and Technology10.1145/3654777.3676330(1-16)Online publication date: 13-Oct-2024
    • (2024)EchoWrist: Continuous Hand Pose Tracking and Hand-Object Interaction Recognition Using Low-Power Active Acoustic Sensing On a WristbandProceedings of the 2024 CHI Conference on Human Factors in Computing Systems10.1145/3613904.3642910(1-21)Online publication date: 11-May-2024
    • (2024)MAF: Exploring Mobile Acoustic Field for Hand-to-Face Gesture InteractionsProceedings of the 2024 CHI Conference on Human Factors in Computing Systems10.1145/3613904.3642437(1-20)Online publication date: 11-May-2024
    • (2024)TriPad: Touch Input in AR on Ordinary Surfaces with Hand Tracking OnlyProceedings of the 2024 CHI Conference on Human Factors in Computing Systems10.1145/3613904.3642323(1-18)Online publication date: 11-May-2024
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    • (2023)VibAware: Context-Aware Tap and Swipe Gestures Using Bio-Acoustic SensingProceedings of the 2023 ACM Symposium on Spatial User Interaction10.1145/3607822.3614544(1-12)Online publication date: 13-Oct-2023
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