ABSTRACT
Electroacoustics is concerned with the transduction of acoustical to electrical energy and vice versa.
Transducers that convert acoustical signals into electrical signals are referred to as ‘‘microphones’’ or
‘‘hydrophones’’, depending on whether the acoustic medium is air or water, respectively. Transducers that
convert electrical signals into acoustical waves are referred to as loudspeakers (or earphones) in air and
projectors in water.
