Headphone and Speaker Test Online

Most often the earbud mesh is clogged with earwax or dust; with earbuds this is the main cause. Less often it is a shifted system balance, a torn ear tip or a worn driver. Sometimes it is not the earbud at all but the ear. Balance mode tells them apart: find the middle, swap the earbuds and find it again. If the same earbud stays quieter, clean or replace it; if the same ear stays quieter, it is worth checking your hearing.

Open “No sound?” and press “Beep”: if the browser outputs sound, the cause is further down the line. On Windows the output is most often set to a monitor or TV over HDMI with no speakers — you can see it from the speaker icon next to the clock. Also check that the tab itself is not muted and that Bluetooth headphones have not connected to another device. On a laptop or phone the tool can listen to the speakers with the microphone and find the output the sound really goes through.

Look at the meters under the buttons: if the bar moves only under the left one, the page sends sound only to the left, and the system mixes the channels — Mono audio is on (Android, Windows) or Mono Audio (iPhone). If the bars move under both, check whether the browser or driver has processing that turns stereo into mono.

Press “Quick test”: the voice saying “Left” must come from your left ear. If you hear it on the right, the sides are swapped — the headphones are on backwards, the speaker cables are crossed or a channel swap is enabled in the driver.

5.1 and 7.1 — yes: if your system sound output is set to a receiver over HDMI or a surround sound card, the 5.1 / 7.1 mode sends each signal to one physical speaker and names it by voice. Chrome or Edge on a computer is the most reliable. If the output is stereo, the tool tells you so and simulates the speaker positions for headphones. Dolby Atmos cannot be tested from a web page: height speakers need an Atmos stream that browsers do not pass through.

Not at a sensible volume, but with a sweep the volume really matters. Below about 40 Hz a small driver cannot reproduce the note: it moves its full travel and the power goes into excursion, not sound. That is why a loud low sweep is harder on a laptop or phone than music at the same setting. Start low, listen for rattle — and if it appears, turn it down, not up.