CAR ACOUSTIC DETECTOR
acoustic fault detector

CarAcousticDetector turns your phone into a pocket acoustic workshop helper for cars. Listen to the engine bay with the microphone, see a live LED frequency spectrum (0–8000 Hz) powered by FFT analysis, and get clearer suggestions for common mechanical noise sources — bearings vs valvetrain, belt squeal, turbo whistle, exhaust vibration, piston slap and combustion knock.

Free features

• Real-time microphone capture (44.1 kHz PCM)
• Live FFT frequency spectrum with smoothing for readability
• Acoustic anomaly hints for common fault bands
• OBD-II ELM327 Bluetooth Classic: pair, connect, read DTCs, clear Check Engine codes
• Basic Polish/English DTC dictionary
• Dark professional interface

Pro (one-time purchase or subscription, product pro_unlock) adds an unlimited longer recording buffer, diagnosis history with PNG chart and WAV audio export, advanced OBD live parameters (RPM / coolant temperature), and removes AdMob ads.

A Fast Fourier Transform converts engine sound into frequency bins. Mechanical issues often leave characteristic acoustic signatures before a dashboard light appears. Combine spectrum clues with OBD trouble codes for a fuller DIY / workshop check.

Requirements: Android 8.0+ (API 26), microphone permission, and Bluetooth for OBD adapters (ELM327 Classic / SPP).

CarAcousticDetector is an assistive diagnostic tool, not a substitute for professional workshop inspection or calibrated instruments. Developer: Maxsoft Software.