CH 01 · Audio
Bass Test
This bass test plays a quiet low-frequency sweep and tones from 10 to 200 Hz, with the frequency shown. Start playback to check your device’s bass and subwoofer.
Start low and turn it up slowly, above all in headphones: loud tones can harm your ears.
What this bass test checks
The test plays low tones in a sweep and in steps from 10 to 200 Hz. The current frequency appears on the page, so you can follow which tone is playing as you listen.
Use the sweep to check whether your device plays the low tones. The rattle check helps you listen for unwanted rattling during playback. The subwoofer crossover check helps you check whether a subwoofer plays bass across the test tones.
The test starts quiet. Keep the volume at a comfortable level and raise it only if you need to hear the tones. The page checks sound playback, not hearing.
Understanding the readings and checks
The frequency shown is the tone being played at that moment, in hertz (Hz). During the sweep, it changes across the range from 10 to 200 Hz. During the stepped test, tones play at points in that same range.
The rattle check has no separate number or pass score described here. Listen for rattling that happens along with a tone; a sound that appears at one point may help you identify when the rattle occurs.
The crossover check is for a subwoofer. It helps you check whether the subwoofer plays the bass tones in the test.
When the result sounds wrong
If you hear no sound, the device may not be playing the test audio. Check that playback has started and that your device can produce sound. A quiet tone may be hard to hear, so listen in a quiet place and adjust the volume carefully.
If you hear rattling, note which displayed frequency is playing when it occurs. A rattle can come from the device or the surface it is on, but this test cannot identify its exact source.
If the test is silent or still does not sound right, the page links to the no-sound fix guide. Use that guide for next steps; this page does not promise that a fix will work.
Using the test with a subwoofer
Run the sweep and watch the displayed frequency while listening to the subwoofer. The test covers low tones from 10 to 200 Hz, and the crossover check helps you listen to how the subwoofer handles those tones.
Use the test to notice whether the subwoofer produces sound during the sweep and whether any rattling occurs, rather than treating one reading as a score.
Browser support
| Browser | Runs |
|---|---|
| Chrome and Edge on a computer | Yes |
| Firefox on a computer | Yes |
| Safari on a Mac | Yes |
| Safari on iPhone | Yes |
| Safari on iPad | Yes |
| Chrome on Android | Yes |
| Samsung Internet | Yes |
| Browsers inside apps | Yes |
Source: MDN browser-compat-data 8.1.8 · checked November 6, 2026
Questions
What does a bass test do?
It plays low tones and shows the frequency as the tone changes. You can listen for bass output and use the rattle check to notice unwanted rattling.
How does the subwoofer test work?
It plays a low sweep and stepped tones from 10 to 200 Hz. The displayed frequency tells you which tone is playing, and the crossover check helps you listen to the subwoofer across the tones.
Why does the bass test start quiet?
The test starts with quiet playback. Raise your device volume carefully if you need to hear the tones.
What does a rattle during the bass test mean?
It means you hear a rattling sound while a tone plays. Note the displayed frequency at that moment; the test cannot identify the exact source of the rattle.
What if I hear no sound?
Check that playback has started and that your device can produce sound. If there is still no sound, use the no-sound fix guide linked on the page.
Is this a hearing test?
No. It checks sound playback from your device and helps you listen for rattles or subwoofer output. It does not assess hearing.