An intentionally monotonous English Grammar lecture structured for deep focus and sleep, totaling three continuous hours. This session is divided into two parts: 40 Minutes: The "boring" English Grammar lesson delivered in a flat, soothing monotone. 2 Hours 20 Minutes: A seamless transition to pure, continuous HVAC Brown Noise. This full 3-hour track is perfect for: A complete deep concentration or study session. Guiding you gently to sleep with the narrative, followed by sustained, non-distracting ambient noise. Using brown noise to mask distracting environmental sounds.