Grey Noise

How it's made

Source

continuous seeded pink pressure noise, with equal energy per octave before perceptual shaping.

Body

approximate equal-loudness compensation boosts bass below 180 Hz by 12 dB and reduces the sensitive 2.8 kHz region by 10 dB (Q 0.55); an 8 dB upper shelf restores air above 7 kHz.

Layers

a shared centre and two independent diffuse fields receive identical broad EQ, preserving spectral balance in mono without delays, comb filtering, narrow resonances or tonal components.

Envelope

constant sustain for the entire 10 s loop; engine boundary crossfade provides the seam. No rhythmic modulation, events or fades interrupt the deliberately stationary masking spectrum.

Band limits

a 35 Hz high-pass removes subsonic pressure; a 13 kHz low-pass bounds the upper shelf.

Variation

seeded fields vary noise microstructure only. Soft canopy darkens the top, clear desk clears deep bass, and full spectrum extends both ends with stronger perceptual compensation.

Calibration

a broad generic approximation, not an individual hearing profile or medical treatment.

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.