1000
Hz
Click the large frequency display to type a value. Audio is generated locally by Web Audio.
20Hz
20kHz
1000 Hz
B5 +9¢
sine
Center
50%
Generate precise test tones directly in your browser: choose sine, square, triangle or sawtooth waveforms, set any frequency, and use sweeps to test speakers, subwoofers, headphones and stereo channels. Audio is synthesized locally with the Web Audio API — no files, no network.
Play a mid-range tone (for example 440 Hz) and use the channel/balance control to route it to one side at a time. If sound comes from the wrong side, the speakers or the plug are swapped; if one side is silent, check the cable and balance settings before blaming the speaker.
Sweep or step through the 20–80 Hz range at moderate volume. A working subwoofer reproduces these frequencies clearly; rattling or buzzing at specific frequencies reveals loose parts or room resonances. Small desktop speakers producing nothing below 60–80 Hz is normal.
Roughly 20 Hz to 20 kHz for young, healthy ears. The upper limit naturally drops with age — losing everything above 15–16 kHz as an adult is common. When exploring your own range, always start at low volume: high frequencies can be loud without feeling loud.
A sine wave is a single pure frequency and is the standard for testing. Square, triangle and sawtooth waves add harmonics above the base frequency, which makes them sound harsher and makes them useful for hearing distortion, rattle and resonance problems that a sine tone can hide.
Start low, always. Sustained pure tones concentrate all their energy at one frequency and can damage both hearing and small speakers faster than music at the same perceived loudness. Increase the level gradually and stop at the first sign of distortion.
More free hardware tests: Monitor Test · Mouse Test · Keyboard Test · Gamepad Test · Webcam Test · Microphone Test — or browse all BeogradPC tests.