Many hospitals are noisy and stressful places. Evaluating the hospital soundscape requires insight into how the acoustics is impacted by architecture, building systems design, material selection, etc., and the corresponding response of staff, patients, and visitors to the sound environment. Healthy hospital soundscapes are vital to patient sleep and recovery, staff health, task performance, and communication, and visitor comfort. Although there is growing and strong evidence that the hospital soundscape is problematic, there are many remaining questions and obstacles. The Healthcare Acoustics Research Team (HART) is an international, interdisciplinary collaboration of specialists in architecture, engineering, medicine, nursing, and psychology. HART is actively engaged in research in the United States and Sweden, having worked in a dozen hospitals and a broad range of unit types including intensive care, emergency, operating, long-term patient care, mother-baby, and others. HART seeks to advance the understanding of how various aspects of the hospital soundscape impact occupants, how to best measure and quantify these aspects, and how to translate results into evidence-based-design. Taken as a whole, these studies provide new insight into how to create healthier hospital acoustic climates.