Sound Meter & Level Tools vs NVH Source Locator

Turn your iPhone into a complete toolkit with 15+ professional tools — all free, no ads, no subscriptions. PRACTICAL TOOLS • Spirit Level — 2D bubble level for hanging pictures, checking surfaces, and leveling furniture • Metal Detector — find studs in walls, locate pipes, and detect metallic objects with haptic feedback • Decibel Meter — measure sound levels (dB) with real-time display and OSHA safety warnings • Vibration Analyzer — diagnose equipment issues and detect vibration patterns • G-Force Meter — measure vehicle acceleration and impacts COMPASS & NAVIGATION • Digital compass with magnetic heading and cardinal directions • GPS coordinates (latitude, longitude, elevation) • Real-time altitude calculator using barometer + GPS • Tilt-compensated orientation for accurate readings SENSOR DASHBOARD Monitor 10+ phone sensors in real-time: Accelerometer • Gyroscope • Magnetometer • Barometer • GPS • Proximity • Light • Battery • Sound • Pitch FLASHLIGHT & LIGHTING • LED flashlight with instant toggle • Strobe light (1–20 Hz) for parties and events • SOS morse code signal for emergencies • Red light mode to preserve night vision • Screen light with customizable colors • Auto-off timer CONCERT MODE Stand out at concerts, festivals, and live events: • Scrolling text messages with emoji support • 10+ templates (MARRY ME, HAPPY BIRTHDAY, I LOVE MUSIC) • Beat-sync strobe — flashlight pulses to music rhythm • Color effects and animations • Share to TikTok, Instagram, and Snapchat AUDIO ANALYSIS • Beat detection for music-reactive lighting • Pitch detection — identify musical notes • Sound frequency analysis with FFT WHO IS THIS FOR? • Home improvement — hang pictures straight, find studs, check surfaces • Construction & DIY — level measurements, metal detection, vibration • Outdoor & hiking — compass, altitude, GPS coordinates • Concerts & festivals — lighting effects, scrolling text, strobe • Students — physics demonstrations, sensor exploration • Sound engineers — decibel monitoring, pitch detection WHY THIS APP? • 100% FREE — every tool included, no paywalls • Works OFFLINE — no internet needed for most tools • LIGHTWEIGHT — under 35 MB, low battery usage • PRIVATE — all sensor data stays on your device • ONE APP replaces a dozen single-purpose tools

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