Sound test and audio test tools
Check a microphone, find a dead speaker, confirm left from right, see how high you can still hear, or put a clean 1 kHz tone through your system. Nothing to install; it all runs in this tab.
Volume first. Turn your device volume down before pressing play, then raise it slowly. Tones start quiet on purpose. Keep headphones off your ears until you know how loud it is.
Check speakers and headphones
- Speaker test
Channel, range and polarity checks for stereo speakers.
- Left / right test
Confirm which side is which, plus a panning sweep.
- Headphone test
Channels, phase, bass extension and treble in one pass.
- Subwoofer test
Bass tones from 10 Hz, a low sweep and a room-mode calculator.
Measure with your microphone
- Mic test
Live level meter, noise floor and a 5-second record-and-playback check.
- Spectrum analyzer
Real-time FFT of your microphone with peak hold and note readout.
Check your hearing
- Hearing test
A quiet-tone check of each ear at six frequencies. Not a diagnosis.
- Hearing age test
Find the highest frequency you can still hear.
Generate test signals
- Tone generator
Sine, square, triangle and sawtooth from 1 Hz to 22 kHz.
- Frequency sweep
Logarithmic or linear sweeps over any range and duration.
- Noise generator
White, pink and brown noise with a fade-out timer.
- DTMF generator
Telephone keypad tones, single keys or whole sequences.
- Binaural beats
Two slightly different tones, one per ear.
Which test do I need?
- Nobody can hear you on a call: start with the mic test. If the meter moves here but not in your app, the problem is the app's input setting, not the microphone.
- Sound only comes from one side: the left/right test tells you whether a channel is dead, swapped or just panned.
- Music sounds thin or hollow: run the polarity check on the speaker test; a reversed wire is a common, free fix.
- Setting up a subwoofer: use the subwoofer test tones and the low sweep to find rattles and room boom.
- Tuning or lab work: the tone generator plays any frequency from 1 Hz to 22 kHz; the spectrum analyzer shows what your mic picks up.
What a browser can and cannot measure
Your browser generates tones with sample-accurate timing, so frequencies here are as precise as those from a hardware signal generator. What it cannot know is how loud the result is in the air. Volume settings, amplifiers, driver quality and room acoustics all change the level, which is why hearing checks here compare your ears with each other rather than giving calibrated decibel thresholds.
Microphone tools read the raw input level in dBFS (decibels relative to digital full scale). They are ideal for finding clipping, silence, a noisy preamp or a missing frequency range, but a phone or laptop mic is not a calibrated sound level meter.
Questions people ask
Do these audio tests need any software?
No. Every tool runs in your browser with the Web Audio API. Tones are generated live on your device, and microphone tools process audio locally without uploading it.
Why can't I hear a test tone?
Check that the tab is not muted, the right output device is selected, and your volume is up a little. Very low (under 40 Hz) and very high (over 15 kHz) tones are often inaudible on phones, laptops and earbuds simply because the speaker cannot reproduce them.
How accurate are browser test tones?
The frequency is exact to within a fraction of a hertz, because it comes from your device's audio clock. Loudness is not calibrated: the level you hear depends on your volume setting, amplifier, speakers or headphones, and the room.
Is the hearing test a real diagnosis?
No. It is a screening-style check that can show a difference between ears or at certain pitches. Only a calibrated test by an audiologist can measure hearing thresholds. See an audiologist if you notice any change in your hearing.