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Generate Soothing Noise for Focus, Sleep, or Testing

Play continuous white, pink, or brown noise with adjustable volume. Useful for concentration, sleep aid, tinnitus relief, audio equipment testing, and sound masking.

Generates three types of noise signals — white noise (equal energy per frequency), pink noise (equal energy per octave), and brown noise (stronger low frequencies) — using the Web Audio API.

Pink noise has been shown in studies to improve deep sleep quality by synchronizing brain wave activity, while white noise is most effective for masking environmental sounds.

What Do Your Results Mean?

Result Range Meaning
Good Noise sounds smooth and consistent with no crackling or gaps Your audio output system is working properly and can reproduce the full frequency spectrum without artifacts.
Warning Noise has subtle buzzing, hissing, or uneven frequency response Your speakers or audio driver may have frequency response issues. Try different output devices to isolate the problem.
Poor Noise crackles, stutters, or has audible dropouts Audio buffer underruns are occurring. Close other applications to free up CPU resources, or increase your audio buffer size in system settings.

Common Issues & Solutions

Noise audio crackles or stutters during playback

Audio buffer underruns cause crackling. Close CPU-intensive tabs and applications. If using Bluetooth speakers, try wired speakers instead, as Bluetooth codec artifacts can cause similar issues.

No sound is produced when clicking play

Check that your browser tab is not muted (look for a speaker icon on the tab). Verify your system volume is up and the correct output device is selected. Some browsers require a user interaction before playing audio.

Brown noise sounds the same as white noise

Your speakers or headphones may lack bass response. Brown noise emphasizes low frequencies (below 500 Hz). Try headphones with better bass extension, or check that your system equalizer is not cutting low frequencies.

Related Tools

Frequency Generator

Generate any frequency from 20 Hz to 20 kHz

Bass Test

Test bass response from 20 Hz to 250 Hz

Hearing Test

Measure hearing thresholds at key frequencies

Frequently Asked Questions

What is the difference between white, pink, and brown noise?

White noise has equal energy at every frequency, sounding like static or a waterfall. Pink noise has equal energy per octave, reducing higher frequencies by 3 dB per octave — it sounds more balanced and natural, like steady rain. Brown noise drops 6 dB per octave, emphasizing deep low frequencies — it sounds like a low rumble or distant thunder.

Can noise generators help with tinnitus?

Yes, sound masking is a common tinnitus management technique recommended by audiologists. White or pink noise at a comfortable volume can partially or fully mask tinnitus perception. This is not a medical treatment — consult an audiologist for persistent tinnitus. The generator runs locally and can be used continuously without internet after loading.

Is it safe to use noise generators for sleep?

At moderate volumes (below 70 dB), noise generators are generally considered safe for sleep use. Keep the volume at the minimum level needed to mask disturbances. Prolonged exposure to loud noise above 85 dB can cause hearing damage. Use a timer if available, and position speakers away from your head rather than using in-ear headphones overnight.

How is the noise generated in the browser?

The Web Audio API's AudioBuffer is filled with random samples. For white noise, each sample is a random value between -1 and 1. Pink and brown noise apply frequency-shaping filters to the white noise signal. All generation happens in real-time on your device using JavaScript and the Web Audio API — no audio files are downloaded or streamed.