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Related Experiment Video

Updated: Aug 12, 2025

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MilliLoc: Human computer interaction oriented acoustic millimeter-level real-time locating system.

Zhisheng Wang1, Liang Liu2, Junning Cui1

  • 1Center of Ultra-precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin 150080, China.

The Review of Scientific Instruments
|February 1, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces MilliLoc, a new human-computer interface (HCI) system for millimeter-level acoustic equipment locating. MilliLoc offers high accuracy and compatibility with smart devices, overcoming limitations of existing systems.

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Area of Science:

  • Human-Computer Interaction (HCI)
  • Acoustic Signal Processing
  • Real-time Localization Systems

Background:

  • Growing interest in acoustic localization for intelligent HCI.
  • Existing systems lack smart device compatibility and require complex setups.
  • High cost and large microphone spacing limit current acoustic locating technologies.

Purpose of the Study:

  • To propose MilliLoc, a novel HCI system for millimeter-level real-time acoustic locating.
  • To design a high-performance, convenient microphone array compatible with smart devices.
  • To develop a simplified, real-time acoustic locating algorithm for accurate time delay estimation.

Main Methods:

  • Development of a high-performance microphone array with a 96 kHz sampling rate and real-time dataflow.
  • Implementation of an improved generalized cross-correlation phase transform method for accurate time delay estimation.
  • Integration of the microphone array and algorithm to demonstrate the MilliLoc system.

Main Results:

  • MilliLoc achieves millimeter-level real-time acoustic locating.
  • The system demonstrates a median 2D accuracy of 7.2 mm within a 60 cm sector area.
  • The proposed method accurately estimates time delay even with low signal-to-noise ratios.

Conclusions:

  • MilliLoc provides a compatible and accurate solution for acoustic locating in HCI.
  • The system overcomes the limitations of existing technologies in terms of accuracy, cost, and device compatibility.
  • The developed microphone array and algorithm enable precise real-time equipment localization.