The term 'study of sound' can be defined as ACOUSTICS (9 letters) and ACOUSTIC (8 letters). ACOUSTICS is the branch of physics that deals with the study of all mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. ACOUSTIC is a related term which refers to the properties of sound and sound waves. ACOUSTICS is an important field of study for many professions such as engineers, architects, and musicians.