NVH Source Locator
TDOA Vibration Source Finder
Free · In‑App Purchases
Locate noise & vibration sources with TDOA precision. Now print or share professional PDF reports with your own letterhead.
NVH Source Locator is a TDOA-based measurement tool for finding noise and vibration sources in structures using accelerometer signals captured on your oscilloscope or measurement system.
Built for NVH engineers, automotive diagnostics, machinery troubleshooting, and structural analysis. Works fully offline — no data leaves your device.
HOW IT WORKS
Place 2–6 accelerometers on a structure, capture the time difference between sensors when they detect the noise/vibration event, and the app calculates where the source is. More sensors mean more precise localization:
- 2 sensors → distance along a line
- 3 sensors → 2D position
- 4 sensors → 3D position
- Up to 6 sensors with over-determined least-squares solver for maximum accuracy
FEATURES
- Seven measurement modes: 2-Sensor, 3-Sensor, 3-Sen+, 4-Sensor, 4-Sen+, 3D, 3D+
- Sound speed library with 100+ engineering materials (metals, polymers, glass, fluids)
- Temperature compensation for 14 commonly-used metals (Aluminum, Steel, Copper, etc.)
- Custom material support — calibrate in-situ and save the result
- Photo annotation — overlay sensor markers on a photo of your setup
- PDF report generation with custom header for your company
- Backup & restore of all settings, custom materials, favorites, and history
FULLY LOCALIZED
Complete app interface and on-device user guide in 30 languages: English, Deutsch, Español, Français, Italiano, Português, Polski, Čeština, Slovenčina, Русский, Magyar, Hrvatski, Български, Беларуская, Svenska, Norsk, Suomi, Română, Türkçe, 中文, 日本語, 한국어, العربية, فارسی, हिन्दी, ไทย, Tiếng Việt, Bahasa Indonesia, Bahasa Melayu, Filipino. Complete online documentation at nvh.evdiag.net mirrors the in-app help in every language.
FREE VS PRO
The 2-Sensor mode is fully free with no limits. Pro unlocks all advanced modes (3-Sensor through 3D+), photo annotation, PDF reports, custom materials, and backup/restore — a single one-time purchase, lifetime access.
WHO IT'S FOR
- NVH engineers in automotive, aerospace, and electric vehicle development
- Diagnostic specialists tracking down rattles, squeaks, and vibration sources
- Structural analysts and acoustic consultants
- Machinery maintenance teams locating bearing failures and resonance issues
PRIVACY
NVH Source Locator works entirely offline. No measurement data leaves your device. No analytics, no tracking.
Developed by EVDiag. Full user manual at https://nvh.evdiag.net
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What's new:
- Print & share: reports can now be printed, saved as PDF or shared directly from the app.
- Your custom report header (letterhead) appears at the top of every printed/saved PDF, matching the on-screen preview. Set yours in Settings → Report header text.
- Minor fixes and performance improvements.
The developer, Roman Franta, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Roman Franta
- Size
- 12.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- NVH Source Locator Pro $19.99
- Copyright
- © 2026 EVDiag (Roman Franta)