White Noise Generator

How energy spreads across frequencies. White is equal power everywhere — bright and hissy, maximum masking. Pink drops 3 dB per octave, matching how hearing perceives evenness — it's why it sounds like steady rain. Brown drops 6 dB per octave — a deep rumble like surf or a distant engine. Most people find brown least fatiguing overnight and white best at masking speech.

The evidence supports a specific mechanism: masking. Noise raises the background sound floor so sudden spikes — doors, traffic, a snorer — stand out less and are less likely to wake you. Studies show faster sleep onset in noisy environments; in an already-quiet bedroom the benefit is smaller. It's a tool against interruptions, not a sedative.

Synthesis has no loop seam (the subtle repeat-point that recordings train your brain to anticipate), no files to buffer, no streaming to stutter, and it runs offline once the page loads. The pink filter is the classic Kellet design; brown is integrated white noise — the real mathematical definitions, not approximations of them.

Just enough to cover the interruptions — masking works by raising the floor, not by winning a loudness contest. For all-night use, err quieter: sustained sound at high volume is fatiguing and, at genuinely loud levels, a hearing concern. If you're straining to hear someone talk over it in the same room, it's too loud for sleep.