Bass Test

This tool uses the Web Audio API built into your browser to generate pure sine tones at twelve standard low-frequency bands, from 20 Hz up to 250 Hz. These bands follow the same octave spacing that audio engineers use to test subwoofers and speakers, so the results map onto real specs rather than an arbitrary scale.

Press play on any band and the browser's audio engine generates that exact frequency in real time — nothing is streamed or downloaded. Mark each band as heard or not heard once you have listened, and the tool tracks your answers as you move down the list. When you reach a point where a tone plays but you hear nothing, that marks the lower limit of what your current speakers or headphones can reproduce.

Switching between headphones and speakers/subwoofer mode changes the guidance text only; the tones themselves stay identical, so you can run the same test on both and compare where the drop-off happens. Small laptop speakers usually lose bass somewhere between 120 Hz and 200 Hz, while a proper subwoofer stays audible down near 20 Hz.

Everything happens locally inside the audio engine your browser already ships with. No audio file is loaded, no microphone is used, and no data about your results or device leaves the page.