Headphone Tester
Verify left/right stereo channels, driver balance, frequency range, and phase polarity.
Stereo Channel Check
Frequency Range
Moving Balance Test
Sound pans automatically Left ↔ Right. Helps find driver imbalance.
Polarity / Phase
"Out Phase" should sound hollow/wide.
How to Test
- 1.Set your volume to a safe, moderate level (50%).
- 2.Stereo Test: Ensure sound ONLY comes from the clicked side.
- 3.Balance Test: The sound should pan smoothly from left to right. If it jumps or stays centered, your settings are wrong.
- 4.Phase Check: "In Phase" should sound solid and centered. "Out of Phase" sounds weirdly wide.
Troubleshooting
- Sound in both ears when clicking 'Left'? Check if "Mono Audio" is enabled in Windows/Mac accessibility settings. Or your headphone plug might not be fully inserted.
- No sound? Check if the browser tab is muted (speaker icon on tab) or if the correct output device is selected in OS settings.
- Buzzing/Static? Try a different USB port or ensure the audio jack is free of dust.
Audio Diagnostics Guide
What is a headphone test?
A headphone test checks whether both the left and right audio channels are working correctly. It helps you quickly identify issues like silent audio in one ear, distortion, imbalance, or static noise. Using an online headphone test allows you to verify stereo sound directly in your browser without installing any software. This is especially useful for gamers, students, remote workers, and anyone troubleshooting sound problems.
How do I test left and right audio channels?
To test stereo sound, play separate left and right channel audio and listen carefully to confirm the sound matches the labeled side. If the "Left" test plays in your left ear and the "Right" test plays in your right ear, your headphones are working correctly. If both sides sound identical or reversed, check your system's audio balance settings or ensure your headphone jack is fully inserted.
Why is there no sound in one ear?
If one ear has no sound, the issue is often caused by a loose cable, debris inside the audio jack, damaged wiring, or incorrect balance settings. Try plugging your headphones into another device to confirm whether the problem is hardware-related. Cleaning the headphone jack and checking your device's left/right balance slider can also solve the issue.
Why do my headphones sound distorted?
Distorted audio can happen when the volume is too high, the audio file quality is low, or the headphone drivers are damaged. Try lowering your volume first. If distortion continues across multiple devices, the internal speaker drivers inside your headphones may be failing.
Why is my headphone volume too low?
Low volume may be caused by system-level sound limits, device restrictions, or partially damaged wiring. Check your operating system's volume mixer and ensure your headphone balance is centered. On mobile devices, also verify that no hearing protection limits are enabled.
Why do I hear static or crackling noise?
Static noise is commonly caused by a loose connection, interference, or a damaged cable. If you're using wired headphones, gently rotate the connector to see if the sound cuts in and out. For wireless headphones, check battery levels and ensure there is no signal interference nearby.
Why is my audio unbalanced (louder on one side)?
Channel imbalance is common. First, clean your earbud mesh or headphone pads. Then check your system's sound settings and make sure the left and right balance sliders are centered. If wired, a partially damaged cable is often the cause.
How do I check stereo balance on Windows or Mac?
On Windows, go to Sound Settings > Device Properties and adjust the left/right balance sliders. On Mac, open System Settings > Sound and verify the balance slider is centered. After adjusting, use this headphone test again to confirm proper stereo output.
Can I test my headphones without installing software?
Yes. This online headphone test works directly in your browser without downloads or extensions. Simply play the test audio and confirm that both channels respond correctly. It works on desktop, laptop, and most modern mobile browsers.
Why is my audio unbalanced (louder on one side)?
Channel imbalance is common. First, clean your earbud mesh or headphone pads. If the issue persists, check Windows Sound Settings > Device Properties and ensure the L/R balance slider is centered. If wired, a damaged cable is a frequent culprit.
Understanding Frequency Response
Ideally, headphones should reproduce sounds from 20Hz (deep sub-bass) to 20,000Hz (air/treble). If you can't hear the start of the sweep until 50Hz+, your headphones may lack bass. If sound disappears above 15kHz, don't worry—adult hearing naturally rolls off high frequencies over time.
[Image of human hearing frequency response chart]Mono vs. Stereo Audio
Stereo sends different sounds to the left and right speakers, creating a sense of space and direction (critical for gaming). Mono combines both channels into one signal sent equally to both ears. Always disable Mono for testing.
What is Audio Phase?
When speakers are "In Phase," their cones move in and out simultaneously, producing solid bass and a centered image. If wired incorrectly ("Out of Phase"), one cone moves in while the other moves out, cancelling out bass frequencies and making audio sound thin and disorienting.