The term 'SOUNDS AT SPAS' can be broken down into two crossword solutions, AAHS (4 letters) and AHS (3 letters). AAHS stands for Autonomous Sensory Meridian Response, which is a physical sensation characterized by a pleasurable tingling feeling that typically begins on the scalp and moves down the back of the neck and upper spine. AHS stands for Auditory Hallucination Syndrome, which is a condition in which a person experiences auditory hallucinations, or hearing voices or sounds that are not actually present. Both of these terms are related to the spa experience, as they both involve sound-based sensations.