Output
Sine tone; frequency, Hz; stereo routing
UserBenchmark / All Tools / Frequency Response Test
Audio
Frequency Response Test
Sweep an adjustable tone across the audible frequency range.
Free to useNo downloadNo sign-up
Frequency Response Test · At a glance
Quick answer: Sweep an adjustable tone across the audible frequency range. Changes in perceived loudness combine hearing, room and playback-system response.
Frequency Response Test
The test loads when you open it. Device access is requested only after you choose to start.
Detailed guide
How to use this tool
- Use the quiet sweep or select a single frequency.
- Keep volume and listening position unchanged throughout a comparison.
Input
Explicit playback and a low output volume
Browser requirement
Web Audio; AudioContext
Processing
Runs on your device; no tool-result upload
How it works and what the result means
A generated sine wave helps check routing and audibility. Speaker, headphone and audio hardware response strongly influence what you hear; the tool cannot measure response without a calibrated recording chain.
Reading the result
Changes in perceived loudness combine hearing, room and playback-system response. They are not a calibrated frequency-response curve.
What to check next
Disable unintended EQ when comparing devices and stop before changing outputs. Do not boost volume to follow an inaudible frequency.
Very high or low frequencies may be inaudible on working equipment. Do not increase the volume to chase an inaudible tone. This is not a hearing diagnosis.
Frequently asked questions
Can the sweep measure a flat response?
No. Objective response measurement needs a calibrated recording chain and analysis. This sweep is an audibility and routing aid.
How do I start the Frequency Response Test?
Lower your volume first. Select a channel and frequency, then start a quiet tone. Stop playback before changing devices.
Does this tool require a download or an account?
No. Open the interactive tool above in a modern browser. The instructions and explanations are available even with JavaScript disabled; running a test needs JavaScript.
Why can two attempts give different results?
Power settings, background tasks, browser scheduling, operating-system input processing and device settings affect measurements. Compare repeated attempts with identical settings rather than the single highest score.