Acoustics study is the scientific study of SOUND and its properties. It involves the analysis of SOUND waves, their transmission, and their effects on objects and people. Acoustics study includes the measurement of SOUND intensity, frequency, and reverberation, as well as the study of SOUND absorption and damping. The terms 'SOUND' (5 letters), 'BEL' (3 letters), and 'DAMP' (4 letters) are all related to acoustics study. SOUND is a vibration that propagates through an elastic medium, such as air or water, and can be heard when it reaches a person's ear. BEL is a unit of SOUND intensity, equal to 10 decibels. DAMP is the process of reducing the amplitude of a SOUND wave, which reduces its intensity.