Can Your Speakers Play the Full Range?
This test uses the Web Audio API OscillatorNode with exponentialRampToValueAtTime to sweep a continuous tone from 20 Hz to 20 kHz over 5 to 30 seconds. The sweep reveals dead spots (frequencies your speakers cannot reproduce), resonance peaks, and distortion across the audible spectrum. A real-time frequency indicator shows the current position. Test with headphones to isolate speaker issues from room acoustics. All audio is generated locally — zero network requests.
Sweeps a continuous tone from 20 Hz to 20 kHz to reveal frequency gaps, dead spots, and distortion across your speaker's output range.
An exponential sweep covers more perceptual time on lower frequencies where human hearing is more sensitive to gaps.
20 Hz
Ready
20 Hz — 20 kHz
5s
What Do Your Results Mean?
| Result | Range | Meaning |
|---|---|---|
| Good | Continuous sound from low to high with no gaps | Your speakers reproduce the full audible range without dead spots. Minor volume changes across frequencies are normal. |
| Warning | Sound disappears below 100 Hz or above 15 kHz | Your speakers have limited low-frequency or high-frequency extension, common for laptop speakers. Bass content and high-frequency detail will be reduced. |
| Bad | Sound disappears or distorts at multiple points | Your speakers have significant dead spots or driver damage. If gaps appear at mid-range frequencies (500 Hz to 4 kHz), the speaker may be failing. Test with headphones to rule out room acoustics. |
Common Issues and How to Fix Them
Sound disappears completely during part of the sweep
If below 100 Hz, this is a speaker hardware limitation. If at mid-range frequencies, try headphones to rule out room resonance. Persistent mid-range gaps with headphones indicate a playback issue.
Buzzing or rattling noise at certain frequencies
Resonance vibrations from loose parts near the speakers. Remove objects from around the speakers and check for loose grilles. If buzzing persists, the speaker cone may be damaged.
The sweep seems to jump or skip frequencies
This can happen if the browser tab loses focus or the system is under heavy CPU load. Close other tabs, disable background apps, and retry with the browser tab in focus.