This 90 minutes black noise audio is built around extremely low-frequency sub-bass noise, creating a minimal and deep sound environment.

Black noise is designed to be more felt than heard and is often used for grounding, deep rest, and sensory calm.

Any frequency included is integrated below conscious perception and blends into the sub-bass texture.

Ideal for deep relaxation, sleep, grounding, and ASMR low-frequency experiences.

Always listen at very low volume and turn off bass boost, loudness, or any audio enhancement features.

This 90 minutes red noise audio emphasizes very low frequencies, creating a deep and grounding sound atmosphere.

Red noise is often associated with physical relaxation and a sense of stability.

Any added frequency is integrated at a very low level and is not designed to be consciously audible.

Ideal for deep sleep, grounding, relaxation, and ASMR-style low-frequency soundscapes.

Use speakers or headphones carefully at low volume and ensure bass boost is disabled.

This 90-minutes violet noise audio focuses strongly on high frequencies and creates a crisp, fine-grained sound.

Violet noise is often used for masking high-pitched disturbances and specialized focus environments.

Any frequency present is blended subtly and not intended as a distinct tone.

Ideal for concentration, sound masking, tinnitus-friendly environments, and ASMR-style listening.

For comfort and clarity, keep the volume low and disable bass boost.