Hum & buzz
Look for a repeated 50 or 60 Hz harmonic family instead of trusting one convenient low-frequency peak.
Analyze Noise in Your Audio
Upload a recording or use your microphone to screen for mains hum, high-pitched whine, broadband hiss, and clipping. Get the conclusion first, then inspect the evidence.
Runs locallyNo upload requiredFree first-pass diagnosis
Choose a clean audio sample to diagnose
5 to 30 seconds of isolated noise works best. Capture room background, microphone hiss, mains hum, or device whine with minimal speech or music.
WAVMP3M4AOGGFLAC● 100% Private (Runs locally in browser)
READ THE RESULT
Four patterns. One useful next step.
The analyzer separates common noise shapes, explains what the evidence supports, and keeps the conclusion cautious enough to test.
Persistent whine
Track a narrow frequency across the recording to distinguish a stable tone from a brief musical or environmental event.
Broadband hiss
Measure energy spread across a wide band when there is no single dominant tonal pattern.
Controlled retest
Change one cable, charger, microphone position, or input and record again to see whether the pattern changes.
MEASUREMENT LIMITS
A diagnostic screen, not a verdict.
Device processing matters
Phones and laptops may apply automatic gain control, noise suppression, or filtering before the browser receives audio.
Digital level is not sound pressure
dBFS describes the captured digital signal. It cannot be converted to dB SPL without calibration.
Retest one variable at a time
Change the power supply, cable, microphone position, input, or nearby device, then compare the pattern.
COMMON QUESTIONS
Before acting on a diagnosis.
Can this identify the exact cause of a noise?
It can identify patterns that are consistent with hum, persistent tones, broadband noise, or clipping. Similar patterns can have different causes, so the result is a troubleshooting lead rather than proof of a specific faulty device.
Does my audio leave the browser?
No. File decoding, microphone recording, and the first-pass diagnosis run locally in your browser. The page does not upload your recording for analysis.
What is a 50 or 60 Hz hum pattern?
Electrical interference often appears as a fundamental near 50 or 60 Hz plus energy near multiples such as 100, 120, 150, or 180 Hz. The analyzer checks the family of harmonics instead of trusting one peak.
What does persistent tone mean?
A persistent tone is a narrow frequency that remains prominent through much of the recording. It may be perceived as a whistle or whine, but listening and a controlled retest are still needed.
Is this a calibrated sound-level meter?
No. Levels are digital dBFS measurements. They are not dB SPL or dBA unless the microphone and complete signal chain have been calibrated against a reference meter.