Waves in solid and liquid elastic media. Speed of sound. Sound emission, propagation and detection. Acoustic sources. Interference and Diffraction. Stationary waves. Sound reflection and absorption. Sound fields: close and reverberated field. Sound and vibrations transmission. Linear systems. Electric- mechanic-acoustic equivalence. Armonic analysis. Fourier and Lapalce transformations. Transfer functions. Time and frequency response. Linear transducers networks.