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  1. Home
  3. Multi-site Vibration Signal Analysis For Estimating Post-swallow Residue: A Pilot Study.
  1. Home
  3. Multi-site Vibration Signal Analysis For Estimating Post-swallow Residue: A Pilot Study.

Related Experiment Video

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
08:32

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models

Published on: March 1, 2015

Multi-site Vibration Signal Analysis for Estimating Post-Swallow Residue: A Pilot Study.

Jee Hyun Suh1, Jaewon Lee1, Hyun Jin Kim1

  • 1Department of Rehabilitation Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 82 Gumi-ro 173 beon-gil, Bundang-gu, Seongnam-si, 13620, Gyeonggi-do, South Korea.

Dysphagia
|May 16, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Multi-site acoustic analysis can detect post-swallow residue in patients with dysphagia. The harmonic-to-noise ratio (HNR) from a vallecular sinus sensor shows promise for noninvasive residue detection.

Keywords:
Acoustic signal analysisDysphagiaHarmonic-to-noise ratioPharyngeal residueVallecular sinus

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Published on: May 6, 2014

Area of Science:

  • Biomedical Engineering
  • Clinical Diagnostics
  • Swallowing Physiology

Background:

  • Dysphagia, or difficulty swallowing, affects many patients, increasing aspiration risk.
  • Accurate detection of post-swallow residue is crucial for managing dysphagia.
  • Current detection methods can be invasive or inaccessible.

Purpose of the Study:

  • To investigate multi-site acoustic signal analysis for detecting post-swallow residue.
  • To identify optimal sensor locations and acoustic parameters for residue detection.
  • To assess the feasibility of noninvasive dysphagia screening.

Main Methods:

  • Three contact microphone sensors and one audio recorder were placed at four anatomical sites.
  • Acoustic parameters (HNR, jitter, shimmer, etc.) were analyzed during swallowing tasks.
  • Videofluoroscopic swallowing studies served as the reference standard.

    • Main Results:

    • Pre-swallow and post-yogurt swallowing states provided reliable acoustic indicators.
    • The right-lateral vallecular sinus sensor location showed the highest accuracy.
    • High HNR values were paradoxically linked to the presence of residue.

    Conclusions:

    • Multi-site acoustic analysis, especially HNR from the vallecular sinus, may detect post-swallow residue noninvasively.
    • A single-sensor approach using the vallecular sensor may be feasible.
    • Larger studies are needed to validate findings and assess real-time screening potential.