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Test headphones with microphone loop: frequency response sweep curves, channel balance & phase, THD distortion measurement, save and export test reports.
How to measure
Mic not grantedPut on/position the headphones and hold your device microphone near the earcup in a quiet room. The tool plays test signals and the mic captures them for a relative measurement (not lab-calibrated).
Plays a 20Hz–20kHz log sweep and plots the relative frequency response to locate dips and defects.
Press the button below to start the sweep
Measurements rely on the device microphone and are uncalibrated — results are relative references, not lab-grade absolute accuracy.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
This page plays sound through the selected audio output and captures the sound picked up by your microphone. Allow microphone access before running a measurement. It provides three modes: a 20 Hz–20 kHz sweep for a relative frequency curve, a left/right and phase check, and a tone-based total harmonic distortion (THD) estimate using selectable preset tones.
THD (%) = √(sum of measured harmonic amplitudes²) ÷ fundamental amplitude × 100
The estimate analyzes the fundamental and harmonics up to the fifth order.
The sweep is a six-second logarithmic frequency sweep. Channel mode compares captured left and right levels and phase behavior. THD mode lets you select a tone from 100, 250, 440, 1,000, 4,000, 8,000 or 12,000 Hz. Results and saved records describe this setup, not a lab-certified headphone specification.
The microphone hears sound after it has passed through the headphones, the room and the recording chain. Microphone response, placement, headphone fit, room reflections, output volume and device audio processing can all change the captured signal. The displayed curve and dBFS values are therefore relative to this setup, not calibrated sound pressure at the ear.
IEC 60268-7:2025 covers specifications and measurement methods for headphones and earphones. This page does not claim to follow that standard or replace a calibrated measurement rig.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Connect the headphones and select the intended audio output and microphone in your device settings.
Set playback to a low, comfortable level before starting. Grant microphone permission when requested.
Select sweep, channel/phase or THD mode and run the test. For comparisons, keep the device, volume, microphone position and headphone placement as consistent as possible.
Review the relevant curve or result, then save or export a record if you need to compare sessions.
If capture fails, check microphone permission and confirm the selected microphone is receiving sound. If output is silent, check the selected playback device and volume before repeating.
Use cases
See how the tool fits into real work and everyday tasks.
Run channel mode to see whether the playback and captured levels differ substantially or the phase indication changes. Recheck operating-system balance and connections before concluding that a driver is defective.
Use the sweep or selected-tone mode before and after changing a cable, port or placement. Keep the setup fixed so differences are easier to interpret; the result remains a relative comparison.
Q&A
Find concise answers to common questions and confusing cases.
No. It estimates the captured sound through your playback, microphone and room setup. It is not a calibrated coupler measurement or a verified manufacturer specification.
The analysis modes capture audio with the selected microphone while test signals play. Without microphone access, the page cannot produce those capture-based results.
No. It checks playback and captured audio behavior; it is not a hearing assessment or medical test. Consult a qualified professional about hearing concerns.
Notes
Review scope, result limitations, and important precautions before use.
Start with a low volume and stop if the tone is uncomfortable. The WHO advises keeping listening levels down and limiting exposure to loud sound; repeated or prolonged loud listening can put hearing at risk. This tool does not measure sound level at your eardrum and cannot determine a safe exposure level.
Room noise, microphone position, headphone seal and automatic audio processing can make results vary. Treat measurements as setup-dependent troubleshooting information, not as a diagnosis of hearing or a definitive pass/fail judgment about headphones.
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