EarWitness: Loop Detector
Catch your sound machine lying
About
This app analyzes audio to detect repeating sound patterns, helping you verify if white noise machines or other sound sources are truly continuous or looping. It provides precise measurements of loop periods, offering an objective assessment rather than subjective marketing claims. Analyze live audio or existing recordings and export findings for verification.
What's New in EarWitness
1.0
July 30, 2026
Developer apps
FAQ
Does EarWitness have ads?
No, EarWitness is completely ad-free. It does not contain any advertisements, allowing for an uninterrupted analysis experience.
How accurate is EarWitness in detecting loops?
EarWitness uses normalized cross-correlation to analyze audio in real time. A loop is only confirmed after it repeats at least twice, ensuring a single chance match does not trigger a false verdict.
Can EarWitness analyze audio files I already have?
Yes, EarWitness has a feature to analyze existing recordings. You can point the app at a file you've captured elsewhere and run it through the same detector entirely on your device.
What kind of audio can EarWitness detect loops in?
EarWitness can detect any repeating audio, including sleep machines, ambient tracks, HVAC hum, mechanical cycling, and 'seamless' background loops, as long as the full loop fits within one session and repeats at least twice.
What information does EarWitness provide about detected loops?
EarWitness provides a clean readout including the detected loop period and the correlation strength, along with confirming peaks. It focuses on objective measurement rather than subjective soundscapes.
Is my audio data safe with EarWitness?
Yes, EarWitness is designed with privacy in mind. All analysis happens on your device, nothing is uploaded, no account is required, and the app collects no data.
What devices does EarWitness support?
EarWitness is currently supported on iPhone devices. The app utilizes the iPhone's microphone for its audio analysis capabilities.
How often is EarWitness updated?
EarWitness was last updated on July 30, 2026, with version 1.0. Future updates will likely focus on refining its detection algorithms and potentially adding new analysis features.