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Related Experiment Video

Updated: Sep 7, 2025

$Subjective Refraction Test Using a Smartphone for Vision Screening$

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Published on: October 18, 2024

Performing tympanometry using smartphones.

Justin Chan¹, Ali Najafi², Mallory Baker³

¹Paul G. Allen School of Computer Science and Engineering, University of Washington, Seattle, WA USA.

Communications Medicine

|June 20, 2022

Summary

This summary is machine-generated.

A new smartphone-based tympanometer offers a low-cost solution for middle ear function screening. This accessible tool shows high agreement with commercial devices, aiding in diagnosing middle ear disorders.

Keywords:

Health care Signs and symptoms

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Area of Science:

Biomedical Engineering
Audiology

Background:

Tympanometry is crucial for assessing middle ear function and diagnosing related disorders.
Current tympanometry equipment is often expensive, limiting accessibility.

Purpose of the Study:

To develop and evaluate a low-cost, smartphone-based tympanometer system.
To provide an affordable and accessible tool for middle ear screening.

Main Methods:

A portable attachment was designed to vary air pressure and measure middle ear function using a smartphone.
The system operates at 226 Hz and displays real-time tympanograms and peak acoustic admittance.
Tested on 50 pediatric patient ears alongside a commercial tympanometer.

Main Results:

The smartphone tympanometer achieved an average agreement of 86% ± 2% with a commercial device.
Classification of tympanograms by pediatric audiologists showed high concordance between the two systems.

Conclusions:

The developed open-source, smartphone-based tympanometer is a viable, low-cost alternative for middle ear screening.
This technology can significantly improve access to timely and affordable diagnosis of middle ear disorders, especially in developing countries.