20 Hz to 20 kHz sine sweep
The classic full-range test: one smooth logarithmic glide across the whole textbook range of human hearing.
Volume first. Turn your device volume down before pressing play, then raise it slowly. Tones start quiet on purpose. High-frequency tones can seem silent and then turn painfully loud when volume goes up. Never raise the volume just because you hear nothing.
The WAV is rendered on your device at 48 kHz, 16-bit stereo, using the settings above, so you can play it from a USB stick, a TV or measurement software.
What to listen for
Use it to hear where a speaker or headphone starts and stops, find rattles, and spot obvious peaks or dips. Each of the ten octaves gets two seconds in the default 20-second log sweep.
Every other range, including custom start and end points and presets, is on the main frequency sweep generator.
Other sweeps
Questions people ask
How long does each octave take in this sweep?
This sweep covers 10.0 octaves. With the default 20-second logarithmic setting, each octave takes about 2.0 seconds. In linear mode the top octave would take half the total time.
Can I download this sweep?
Yes. Press "Download WAV" to render it on your device as a 48 kHz, 16-bit stereo file, using whatever duration, waveform, level and channel you have set.
Keep testing
- Frequency sweepLogarithmic or linear sweeps over any range and duration.
- Spectrum analyzerReal-time FFT of your microphone with peak hold and note readout.
- Hearing age testFind the highest frequency you can still hear.