Acoustics is the study of mechanical waves that propagate through a medium, such as air or water, in the form of sound. It investigates the physics of sound generation, propagation, reflection, and absorption, analyzing fundamental properties like frequency, amplitude, and wavelength. The field encompasses techniques for measuring sound pressure levels and designing systems to manipulate sound waves, which has diverse applications across various scientific and technological disciplines. These applications include non-destructive structural testing, advanced communication systems, and the development of noise control measures in engineering.