Online Tone Generator

Solfeggio Scale

(9) 7.83hz - Schuman resonance, planetary frequency, base frequency (alpha theta brainwave frequency)
(3) 174hz - Pain reduction and anesthetic properties
(6) 285hz - Cellular repair, body regeneration and better immunity
(9) 396hz - Liberate from guilt and fear
(3) 417hz - Undoing of situations, facilitating change in our lives, alleviate the conscious and subconscious mind from past traumas
(6) 528hz - Create profound transformation, miracles, repair of DNA
(9) 639hz - Healing strained relationships and creating new ones
(3) 741hz - Expression, solutions helping open up to new possibilities
(6) 852hz - Returns us to spirutual order, improving access to the spirtual realm
(9) 963hz - Spiritually awakening and connecting to the oneness of the universe

You can damage your hearing or your speakers if you play tones at extreme volumes. People can’t hear sounds < 20 Hz and > 10,000 Hz very well. If you turn up the volume on your device to compensate, you could expose yourself to harmful sound levels and your speakers to harmful currents. To be safe, note the volume level that allows you to listen to a 1,000 Hz tone without discomfort and do not stray too far above this level, even if you can’t hear much – especially in the high range, where your hearing is the most fragile.

Instructions

To play a constant tone, click Play or press Space.

To change the frequency, drag the slider or press ← → (arrow keys). To adjust the frequency by 1 Hz, use the buttons or press Shift + ← and Shift + →. To adjust the frequency by 0.01 Hz, press Ctrl + ← and Ctrl + →; to adjust it by 0.001 Hz, press Ctrl + Shift + ← and Ctrl + Shift+ → To halve/double the frequency (go down/up one octave), click ×½ and ×2.

To change the wave type from a sine wave (pure tone) to a square/triangle/sawtooth wave, click the button.

You can mix tones by opening the Online Tone Generator in several browser tabs.

What can I use this tone generator for?

Tuning instruments, science experiments (what’s the resonant frequency of this wineglass?), testing audio equipment (how low does my subwoofer go?), testing your hearing (what’s the highest frequency you can hear? are there frequencies you can hear in only one ear?).

Tinnitus frequency matching. If you have pure-tone tinnitus, this online frequency generator can help you determine its frequency. Knowing your tinnitus frequency can enable you to better target masking sounds and frequency discrimination training. When you find a frequency that seems to match your tinnitus, make sure you check frequencies one octave higher (frequency × 2) and one octave lower (frequency × ½), as it is easy to confuse tones that are one octave apart.

Alzheimer’s disease. Some scientists from MIT are seriously investigating the possibility that 40 Hz tones may reverse some of the molecular changes in the brains of Alzheimer’s patients. Initial studies on transgenic mice showed promising results, but (as is often the case) early-stage human trials paint a much murkier picture. Further studies are underway. Here’s a summary of the research so far and a report from a user who tried 40 Hz therapy on his wife. (Note that this tone generator is not a medical device – I don’t guarantee anything!)