Online Speaker & Headphone Test

Verify Left and Right stereo channel separation, acoustic frequency response, and speaker driver balance.

Ready when you are

Check that your left and right audio channels are separated and sound is clear.

Audio output: Default - Stereo Output (System Audio)
Audio tones are generated directly in your browser with Web Audio API.
Testing sound Click any channel below to play tone:
Turn down volume before sweep
Audio output is working properly
Stereo separation and driver balance are operating without distortion.
96/100
Tip: If you only heard sound on one side, check that your 3.5mm headphone jack is pushed in completely.
Technical details & diagnostics
Audio output sampling rate 48,000 Hz
Hardware channels 2 (Stereo)
Panning node StereoPannerNode (W3C Standard)
Synthesizer waveform Sine (Low Total Harmonic Distortion)
Output latency < 15 ms (Low Latency AudioDestination)
Audio playback is blocked

Your browser has blocked autoplay audio. Follow the 3 steps below to permit sound:

1 Click the lock or site settings icon in the left of the address bar.
2 Verify that Sound is set to Allow (Default).
3 Click Enable audio below to resume playback.
No audio output detected

We could not detect any active speaker or headphone output. Please review the 3 items below:

1 Check that your headphone 3.5mm plug or USB DAC is connected firmly.
2 Verify that Bluetooth is enabled and your wireless headset is paired.
3 Ensure your operating system master volume is unmuted and set above 20%.
Read audio troubleshooting guide
Preview State:
Next recommended check Test your microphone clarity and decibel levels
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How to test your speakers in 3 steps

1 Click Test my speakers above to activate the browser Web Audio oscillator.
2 Click Left Channel and Right Channel to verify that sound is isolated to each ear.
3 Trigger the 20Hz–20kHz frequency sweep to test sub-bass rumble and high treble response.

Speaker and headphone troubleshooting guide

Review common headphone and speaker faults, probable causes, and remedies:

Symptom Probable Cause Concrete Fix
Sound only plays in one ear 3.5mm plug is not fully seated or stereo balance slider is off-center. Push the audio jack firmly until you feel a positive click; check balance sliders in OS Sound Settings.
No sound output at all Wrong playback device selected or hardware inline volume wheel turned down. Check the physical volume wheel on your headphone cord and select the correct speaker output in system sound.
Rattling or buzzing during bass sweep Driver diaphragm damage, loose earphone housing, or speaker cone distortion. Lower playback volume to prevent over-excursion; if buzzing persists at low volume, the physical driver is damaged.
Stereo channels appear reversed Headphones worn backwards or reverse stereo routing in third-party audio drivers. Verify the "L" and "R" markings on your headphone headband or toggle stereo invert in your sound card utility.

About this speaker diagnostic test

The Sharing.io.vn speaker and headphone testing laboratory uses the W3C Web Audio API to synthesize uncompressed sine wave tones directly in browser memory. Using a calibrated StereoPannerNode, we route pure sine waves at specific pan positions (-1.0 for Left, +1.0 for Right, 0.0 for Center).

Unlike playing pre-rendered YouTube videos which often undergo lossy MP3 or AAC stereo joint encoding (which leaks sound across channels), our real-time synthesized signals ensure mathematical 100% channel isolation with 0.00% cross-talk.

Safety note: Pure sine wave sweeps between 20 Hz and 20,000 Hz place demanding excursions on small earphone drivers. We recommend keeping your master volume at a moderate 30% to 50% before running frequency sweeps.

Last updated: October 25, 2026 • Verified for Chrome, Edge, Safari, and Firefox.

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Frequently asked questions

How do I know if my Left and Right stereo channels are reversed?
Click the "Left Channel" button in the testing tool. If the tone sounds in your right ear, your headphones are reversed. First verify the physical "L" and "R" markings on your headphone cups or earbuds. If you are wearing them correctly, your computer sound card or audio driver has its stereo routing inverted in software settings.
Can the frequency sweep damage my headphones or speakers?
At normal conversational volumes, our 20 Hz to 20,000 Hz sine wave sweep is completely safe. However, sub-bass frequencies below 40 Hz require significant physical diaphragm travel, and extreme treble can strain small tweeters. Always keep your volume at a moderate level before initiating the sweep.
Why am I only hearing sound from one side of my headset?
In 90% of cases, a single-sided audio issue is caused by a 3.5mm headphone plug that has not been pushed all the way into the audio jack. Try gently wiggling or pushing the plug until it snaps in. If the issue remains, inspect the L/R balance slider in your Windows or macOS Sound Settings to ensure it is centered.
What should bass and treble tones sound like?
An 80 Hz bass tone should produce a smooth, deep hum that vibrates without producing buzzing or chattering sounds from loose speaker grilles. An 8,000 Hz treble tone should sound like a clean, piercing high whistle. Any raspy distortion indicates physical driver damage or audio amplifier clipping.
Why is there no sound even though my computer volume is turned up?
Check if your browser tab is accidentally muted (indicated by a speaker with a slash through it on your browser tab). Next, verify whether your operating system has selected the correct default playback output device (e.g. Speakers vs HDMI audio vs Headphone jack).
Can I test Bluetooth headphones or wireless earbuds here?
Yes. Pair and connect your Bluetooth headphones to your computer or mobile device. Once your operating system switches audio output to the Bluetooth device, click "Test my speakers" to test stereo separation and driver latency over Bluetooth A2DP audio.
Hearing audio in only one ear or experiencing sound popping/crackling? View Audio Output Troubleshooting Guide