Sound Test — Free Online Test

Our Sound Test plays generated test tones through your left and right channels, sweeps across the audible frequency range, and includes a custom frequency generator from 20 Hz to 20 kHz. Use it to verify that both speakers work, identify blown drivers, and check the frequency response of your laptop, headphones, or external speakers.

How to use the Sound Test

Set your system volume to a comfortable, low level before starting.
Play the Left, Right, and Center tests to verify stereo separation.
Play the Low, Mid, and High frequency tests to check frequency response.
Use the custom frequency slider to isolate any specific tone.

How to interpret your results

A working stereo system produces sound only in the tested channel. If sound comes from both sides during the Left test, either your channels are wired incorrectly or the audio is being downmixed to mono. Missing bass indicates small drivers or a blown woofer; missing highs point to a blown tweeter or aggressive OS EQ.

Common issues and what they mean

No sound at all

Check that the correct output device is selected in the OS sound panel and that no headphones are plugged in.

Crackling at high volumes

The speaker is being over-driven. Reduce volume to below 80% and retest.

One channel silent

Try a different app. If it persists everywhere, the speaker or its cable is likely failing.

When to run this test

After buying used speakers or headphones.
When one earbud sounds quieter than the other.
To A/B test EQ settings.

Frequently asked questions

What frequencies should I be able to hear?

Young adults typically hear 20 Hz to 18 kHz; hearing above 15 kHz drops with age.

Can this damage my speakers?

Only if you play very loud tones for long periods. Keep volume moderate.