The Effect of Noise on Sleep
Jun 26, 2025 The effect of noise on sleep Brandon Ballinger How detrimental is noise for your sleep? Andrej Karpathy raised this exact question in a tweet. The answer to Karpathy’s question is, well, empirical, with a rough experiment suggested by Paul Graham: Consumer devices like Apple Watch measure many sleep metrics, including sleep stages, heart rate variability, and heart rate. The Apple Watch’s microphone also measures noise in fine-grained frequency, which can be filtered down to times