Sound and noise is the number one complaint among hotel guests, with 75% of issues going unreported. Guest ratings are 32% higher without noise problems, and 86% of people are less likely to recommend or revisit a hotel after a bad experience from noise. The most common noise complaints mentioned are from plumbing like toilets, footsteps from rooms above, voices in halls, noises from adjacent rooms, outside sounds, and mechanical equipment like air conditioning. Addressing noise can significantly improve guest satisfaction and loyalty.