Speaker Test (Stereo Check & Tone Generator)
Check that your speakers or headphones are not swapped left to right and that both sides play. You can also play a tone at any frequency to see how low and how high your gear can go. To test a microphone, use the Microphone Test. Sound is generated on this page and nothing is sent anywhere.
🔒 Runs in your browser · Your data is never sent to a server
Turn the volume down before you start playback, then raise it slowly. High frequencies and square waves in particular can hurt your ears or damage speakers.
Left / right channel test
Stopped
Test tone settings
Common frequencies
Frequency sweep (20 Hz to 20 kHz)
Raises the pitch smoothly from 20 Hz to 20,000 Hz over 20 seconds. The point where the sound disappears is a rough limit of your equipment or your hearing.
Notes
- Playback starts when you press a button, because browsers do not allow sound without a user action.
- Start with a low volume. The default volume is kept low to protect your ears and equipment.
- To check stereo left and right, make sure your browser or OS audio is not set to mono, which makes the two sides indistinguishable.
- Small speakers such as those in laptops barely reproduce anything below 100 Hz. Not hearing it does not necessarily mean a fault.
- Hearing near 20 kHz fades with age, so not hearing it is usually normal.
- How a frequency sounds depends on the equipment, the room and your ears, so this is not a substitute for proper measurement.
Glossary
Frequency (Hz)
The pitch of a sound, given as how many times the wave vibrates per second. A higher number is a higher pitch. Human hearing spans roughly 20 Hz to 20,000 Hz.
Sine, square and noise
A sine wave contains a single frequency and is the cleanest tone. Square, sawtooth and triangle waves contain many overtones and sound buzzy. White noise contains all frequencies at equal strength and sounds like static.
Sweep
A test tone whose frequency changes continuously at a steady rate. It is used to find the frequency response and resonances (ranges that ring too loudly) of playback equipment.
FAQ
Only one side plays. Is my gear broken?
First check that your OS or browser audio is not set to mono and that the balance is not skewed. A loose plug is common with earphones, and cables or terminals with speakers. If that does not help, run the same test on other gear to find out whether the fault is in the equipment.
I cannot hear low frequencies (below 50 Hz).
Laptops, phones and small speakers physically cannot reproduce much bass. This is not necessarily a fault; check with a subwoofer, larger speakers or headphones.
I hear nothing. What should I check?
Check that the browser tab is not muted, the OS volume and output device (speakers or headphones), and any Bluetooth switching. Sound starts only when you press a button; just opening the page plays nothing.
Is the sound saved or sent anywhere?
No. The test tone is generated and played inside this page and is never uploaded or stored.
Share this page