Noise Generator
Start quiet. Keep volume low; loud tones or noise can harm hearing or speakers. Not a medical device.
White noise has equal energy per Hz, pink noise falls 3 dB per octave (balanced to the ear), brown noise falls 6 dB per octave (deep rumble).
Noise is looped from a 10-second generated buffer, so it runs without gaps.
White, pink and brown noise online
This free noise generator plays continuous white, pink or brown noise generated in your browser. Pick a colour, press Play and set a comfortable volume; switch colours while it plays.
White vs pink vs brown noise
White noise
Equal energy at every frequency. Sounds like a hiss or TV static. Used to mask sounds and to test the full range of speakers.
Pink noise
Energy falls 3 dB per octave, equal per octave. Sounds balanced, like steady rain. It is the standard test signal for setting up speakers and room EQ.
Brown noise
Energy falls 6 dB per octave, deep and rumbly like a waterfall or distant thunder. Many people find it less harsh than white noise.
Uses for a noise generator
People use background noise to cover distracting sounds while working or reading, and audio engineers use pink noise to level speakers. Whether noise helps you focus or sleep is personal; we make no health claims.
More free audio tools
Hearing and speaker safety
Start with the volume low and raise it slowly. Tones are more tiring than music because all the energy sits at one frequency. Very low tones (below about 40 Hz) can push small speakers and laptop drivers past their limits, and very high tones (above about 15 kHz) can be loud even when you can barely hear them. Take breaks, never test at a level that is uncomfortable, and stop if you notice ringing, pain or rattling.
This site is a sound tool for testing, tuning and experimenting. It is not a medical device and does not diagnose, treat or prevent any condition. If you are worried about your hearing or tinnitus, talk to an audiologist or doctor.
Noise Generator FAQ
Is the noise random or a recording?
It is generated in your browser from random numbers (filtered for pink and brown) into a 10-second buffer that loops seamlessly.
Which noise is best for speaker testing?
Pink noise, because it has equal energy per octave, matching how we hear and how most measurement tools work.
Can I play noise in one ear only?
Yes, press L+R to cycle between both, left and right.