Play a 20 Hz tone and adjust the sound below.
A 20Hz signal completes 20 cycles per second. 20Hz sits near the commonly cited lower edge of human hearing. It is a practical starting point when you want to test bass response, low-end presence, or the difference between pulse and pitch.
Start with your device volume low and stop if playback feels uncomfortable. Do not increase volume to force an inaudible tone to be heard. Browser playback cannot measure hearing thresholds or calibrate sound levels.
Use the preset link on this page to open the Hz Tone Generator at 20Hz instantly. Start with a sine wave for the cleanest reference, then compare it with square or saw when you want more harmonic edge.
20Hz becomes clearer when you compare it against 10Hz, 40Hz, and 50Hz. Keep the same playback level when comparing tones.
Audibility depends on your hearing, speakers or headphones, and playback level. A browser tone is not a calibrated hearing test.
Start with a sine wave if you want the cleanest 20Hz reference. Switch to square or saw only when you want more harmonic texture.
Yes. This page links straight into Hzvibe with 20Hz preloaded, so you can return to the same tone or share the URL with someone else.