Play a 4 Hz tone and adjust the sound below.
A 4Hz signal completes 4 cycles per second. A 4Hz signal lies below the usual audible range. It is different from a 4Hz binaural difference between two audible tones. Use it to explore oscillator settings; do not expect headphones or speakers to reproduce it as a clear 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 4Hz instantly. Start with a sine wave for the cleanest reference, then compare it with square or saw when you want more harmonic edge.
For a headphone comparison using audible carrier tones, use the 4Hz binaural preset instead. Silence at these settings does not establish anything about your hearing.
4Hz is below the usual audible range. Your speakers or headphones may not reproduce it, and a pure tone at this setting is not a reliable audible pulse.
Start with a sine wave if you want the cleanest 4Hz reference. Switch to square or saw only when you want more harmonic texture.
Yes. This page links straight into Hzvibe with 4Hz preloaded, so you can return to the same tone or share the URL with someone else.