Other's here may prefer to install `sox` and generate their own white/pink/brown-noise from 100% recycled electrons by invoking e.g: play -n synth 08:00:00

Other's here may prefer to install `sox` and generate their own white/pink/brown-noise from 100% recycled electrons by invoking e.g: play -n synth 08:00:00 whitenoise for 8 hours of whitenoise, additional filters and modulations create more pleasing output.