Electro-acoustic transducer

Electro-acoustic transducer (10) adapted to be in contact with a fluid under pressure comprising: a tubular body (20) that extends in length along a longitudinal direction X, the tubular body (20) comprising a first end portion (21) and a second end portion (22), opposite to each other longitudinally, the tubular body (20) internally having a first chamber (23), which ends with the first end portion (21) and a second chamber (24), on one side adjacent to and in fluidic communication with the first chamber (23) and on the other side ending with the second end portion (22), the first end portion (21) being closed towards the outside by means of a membrane (26) applied to the tubular body (20), the second end portion (22) having one or more openings (27) that put it in fluidic communication to the outside of the tubular body (20), the first chamber (23) containing in its walls a plurality of electrical windings (25) arranged in succession to each other in the longitudinal direction X, the second chamber (24) being filled with a liquid; a movable element (30) housed in the first chamber (23), the movable element (30) comprising a plurality of permanent magnets (31) packaged and arranged one above the other, with the magnetisation alternating in the longitudinal direction X and separated from one another by discs of ferromagnetic material, the movable element (31) being supported at the longitudinal ends by springs (40), the movable element (30) being also connected to the membrane (26); a movable piston (45) positioned and slidable in the second end portion (22).