Frequency Generator: Hz Tones

Frequency Generator turns your phone into a precise, studio-clean sonic tone generator for sleep, focus, relaxation and sound exploration. Dial in any Hz frequency from a deep 1 Hz rumble to a 22,000 Hz shimmer, shape its sound, layer nature sounds underneath and press play.

WIND DOWN AND SLEEP

Mask traffic, snoring and a restless mind with smooth white noise, pink noise, brown noise or rain sounds. Sleep Through Noise lays down a warm brown noise bed for thin walls, and Deep Sleep eases you toward rest with slow delta binaural beats. Layer a soft tone over the noise, set the sleep timer, turn off the screen and let it play all night.

NATURE SOUNDS FOR SLEEP AND FOCUS

Fall asleep to rain sounds, a thunderstorm, ocean waves, a babbling brook or birdsong on a forest morning, or settle in by a crackling fireplace, in a café or on a train ride. Stack up to three nature sounds under a tone or noise, give each its own volume, and these ambient sounds loop seamlessly all night. Gentle Rain, Rainy Night, Fireside, Ocean Focus and Forest Morning start the sleep sounds with one tap. Bring your own sounds too: import any recording and it plays as a looping sound bed.

FIND YOUR FOCUS

Drop into deep work with binaural beats and isochronic tones, or let steady white noise blur out the café, the office and the roommates. Ready-made sessions such as Study Bed, Flow State and Gamma 40 Hz start with one tap.

RELAX AND MEDITATE

Play the tones people reach for to unwind, including 432 Hz, 528 Hz and the full set of Solfeggio frequencies, as a calm backdrop for meditation, breathwork or simply slowing down. Deep Meditation adds slow theta binaural beats for a longer sit.

TINNITUS MASKING

Steady white noise, or softer pink noise for sensitive ears, helps push the ringing into the background. A slow glide from 4 to 16 kHz lets you pause at the pitch that blends with yours.

A TONE GENERATOR FOR MUSICIANS

Sound any note across nine octaves (C0–B8) as a clean reference tone and set A4 anywhere from 432 to 446 Hz. Tune by ear, train your ear to intervals or check a note on the fly.

TEST SPEAKERS AND HEARING

Use the tone generator to glide from 20 Hz to 20 kHz and hear where your ears stop, check a subwoofer with a deep 30 Hz low frequency tone, and explore the high frequency and ultrasonic range your headphones and speakers can reproduce. The test tones include a 17 kHz dog whistle and the 19 kHz mosquito tone that only young ears catch.

SHAPE EVERY SOUND

Use this frequency generator like a signal generator or audio frequency generator: pick a sine, square, sawtooth or triangle wave, sweep the tone frequency between two points on a linear or logarithmic curve, and stack up to ten layers into your own mix. Set an exact Hz frequency down to the hertz or fine-tune it on a smooth slider.

KEEPS PLAYING

Full background audio with play, pause and timer controls in the notification and on the lock screen, so the sound generator keeps going while you use other apps. Turn on Play alongside other apps to keep music or a podcast playing under your sound.

The tone generator's sine tones and white noise, plus the rain and ocean sounds, are included for everyone. Frequency Generator Pro unlocks every waveform, pink noise and brown noise, binaural beats, isochronic tones, sweeps and layers, the Solfeggio and musical-note presets, every nature sound and your own sounds.

Frequency Generator is not a medical device and does not diagnose, treat, cure or prevent any condition.

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