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Headphone rattle test: pure tones for driver buzzing and loose parts

Walk a sine tone from 30 Hz up to 8 kHz and note where the buzz starts. Use the frequency and channel comparison as clues, then inspect fit, grille, driver, and playback chain instead of treating one tone as a definitive diagnosis.

A headphone rattle test isolates buzzing that music masks. Pure sine tones at increasing frequencies help you find where the symptom appears and compare channels. The trigger frequency can narrow the investigation, but it cannot identify a specific component on its own. Pure tones are useful because complex signals can bury a buzz under other content.

By TechCompare · Updated

Oscillators
1
Single tone
Frequencies
250 Hz
Waveform
Sine
Per-oscillator lanes

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How this is calculated

A loose driver, detached dust cap, broken voice coil former, or loose grille screw can reveal itself at a particular frequency, but a tone only identifies where the symptom appears. It does not provide a universal component diagnosis. Start low and work up at a safe volume, compare both channels, and repeat without touching the headphones to separate a device rattle from room or ear noise.

Verdict

Music is too messy to investigate some headphone problems with. A held pure sine tone can expose a rattle that music masks. Find the trigger, compare channels and physical contact, and treat a persistent device-specific buzz as a reason to inspect or service the headphones. Frequency alone does not distinguish a loose part from a voice-coil fault.

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Frequently asked questions

Why does my headphone buzz with one tone but not others?
Mechanical problems and room or ear interactions can respond differently across frequencies. Playing tones across the band shows where the symptom appears and can narrow the cause, but the trigger frequency alone does not identify a loose part, voice-coil rub, or other specific fault.
Is the buzz from my headphones or my head?
Test the same tones with the headphones on a flat surface. If the buzz disappears, your hair, glasses, or earrings were rattling against the cup. If it persists, the headphones are the source.
What causes headphones to rattle on specific test tones?
Usually a damaged or out-of-spec driver. A pure tone at high volume pushes the voice coil past its normal excursion, which can hit it against the magnet or cause the diaphragm to deform. Other causes include loose screws, hair or debris in the driver, or a blown driver at the rated SPL. Most rattle is a sign the headphones need service or replacement.
Is the rattle from my headphones or my ear?
Easy to tell with a single ear test. Cover one ear with your hand to block it, then replay the tone that rattled. If it still rattles with the same ear uncovered and the other blocked, the issue is in the headphone. If the rattle disappears, you may have congestion or wax in your blocked ear that was vibrating at that frequency.

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