mNasometer: accessible speech assessment
Replicable Low-Cost Treatment Tool (Assistive Device)
Overview
This open-source nasometer system (mNasometer) is designed for accessible speech assessment in clinical contexts, including low-resource settings. The system consists of a 3D-printed hardware device connected to an open-source mobile application. The device can be fabricated using desktop-size 3D printers and assembled with off-the-shelf electronic components and fasteners. The provided design files and documentation support easy replication and customizable use across different contexts.1
Romani A. 2026. *mNasometer: Open-Source Nasometer System - Product hardware V. 1.1. Available at OSF.io. DOI: 10.17605/OSF.IO/9QSRW
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Licenses:
- Hardware: GPL-3.0-Only (More info)
- Software: MIT (More info)
- Documentation: GPL-3.0-Only (More info)
Materials and Tools
- ⚙️ CAD / Parametric modeling: Fusion 360 (CAD modeling tools) 2
- 🔩 Slicing and fabrication (custom components): PrusaSlicer 3 , Small-format Fused Filament Fabrication 3D Printer and Large-format Fused Filament fabrication 3D Printer. Recommended infill patterns, overlap, and types available in the OSF repository.
- 📎 Materials: PETG filaments tested for rigid parts and recommended. TPU 90 Shore A tested for flexible parts and recommended.
- 🔩 Off-the-shelf: electronic supply for audio detection (please refer to the documentation in the repository).
- 🔩 Additional off-the-shelf: screws and nuts (either metric or imperial standard, please refer to the documentation in the repository).
Mobile App
- ⬇️ Download: https://github.com/LarryWangCA/mNasometer, Available on GitHub 4 as mobile app.
- ✒️ Credits: Liwei Wang @GitHub.
- 📱 Use: Mobile app to be matched with this hardware product.
Fusion 360. Available at: https://www.autodesk.com/products/fusion-360/overview
PrusaSlicer. Available at: https://www.prusa3d.com/page/prusaslicer_424/
Wang L, 2026. *mNasometer Available at github.io. Link: https://github.com/LarryWangCA/mNasometer
The mNasometer - product hardware part is an Open Source Hardware Assistive Product certified by OSHWA (Open Source Hardware Association), released under the GNU General Public License (hardware and documentation) and GNU General Public License (GPL) 3.0. (software).
- ✅ Certified Open Hardware - OSHWA UID CA000074 (Certification, license, and links) 5
Western University - FAST Lab. 2026. mNasometer: Open-Source Nasometer System - Product hardware. Certification. Available at OSHWA.org. Link: https://certification.oshwa.org/ca000074.html
Publications
Development and Evaluation of a Low-Cost Open-Source Nasometer
Liwei Wang*, Alessia Romani, Scott Adams, Joshua M. Pearce, Vijay Parsa
Sensors, vol. 26(9), 2026 Apr, p. 2739