Check left and right playback, stereo phase, and audible frequency changes through your headphones. Results are listening checks, not calibrated acoustic measurements.
Test headphone channel balance, frequency sweep response, and stereo phase. Identify left/right imbalances, check whether your headphones reproduce the full audio spectrum, and verify mono-compatibility with a phase test.
Play a 440 Hz tone in each channel to verify balance and channel routing.
Sweeps from 20 Hz to 20 kHz over 10 seconds. Listen for gaps in frequency response.
In-phase: both channels produce normal stereo. Out-of-phase: sound appears to come from outside the head or disappears in mono — used to test mono compatibility.
If in-phase sounds centered and out-of-phase sounds spacious/external, your headphones and audio chain are working correctly.
This tool runs three independent headphone tests using the Web Audio API. The balance test uses aStereoPannerNodeto route a 440 Hz tone to the left channel, right channel, or both. The frequency sweep generates a logarithmic sine wave sweep from 20 Hz to 20 kHz over 10 seconds usingOscillatorNode.frequencyramping. The phase test plays the same 200 Hz tone in both channels, with the out-of-phase version inverting the right channel gain to -1.
Large drivers typically deliver good bass extension to 30–40 Hz. Open-back designs have wider soundstage but less bass. Closed-back designs offer better isolation and stronger bass but narrower soundstage.
Smaller than over-ear, lighter but with less bass extension. Typically flat to 60–80 Hz. Comfort varies due to ear pressure. Good balance between portability and audio quality.
Seal quality determines bass performance. Well-fitted IEMs can extend bass to 20 Hz. Good high-frequency extension in quality models. Highly personal fit requirement.
No ear canal seal means significant bass rolloff below 100–150 Hz. Convenient and affordable but not suitable for bass testing below those frequencies.
More free tools to check your setup.
Test speakers, headphones, left/right stereo channels, frequency sweep, bass, and microphone input online.
Non-calibrated browser hearing range screening with tones from 125 Hz to 16000 Hz. Compare left/right perception and learn when a clinical audiogram matters.
Test your subwoofer and speakers with low-frequency tones from 20 Hz to 200 Hz. Find the lowest bass your system can reproduce.
Free microphone test online. Check mic input level, peak clipping, and live waveform in your browser.
Test individual speaker channels including left, right, center, and surround. Verify each speaker in a multi-channel setup.
Guides on headphone selection, frequency response, and audio quality.
Run a quick left right audio test to catch swapped channels, mono output, or a silent side before blaming your headphones or speakers.
Use a browser stereo test, Windows or macOS checks, and a few hardware swaps to find out whether your problem is reversed channels, mono output, a dead side, or bad balance.