Runs in your browser. Nothing is uploaded.
Bass Test
Play low tones from 20 Hz to 125 Hz, or sweep the range, and listen for what the speaker can still produce.
25%
Laptop speakers often go quiet below 60 Hz. That is the speaker, not a failed test.
Now playing
Idle
More tests
What it measures
Steps
Fixed tones at 20, 25, 31, 40, 50, 63, 80, 100, and 125 Hz.
Sweep
A glide from 20 Hz to 125 Hz so a hole in the low end is easier to hear.
Questions
Why is 20 Hz almost silent?
Most laptop speakers and earbuds cannot move enough air for the lowest tones. A subwoofer or full-size headphones will show more of the range.
Is the tone uploaded?
No. It is synthesized in the browser and played on your output device.