Floating-piston motor pump of hydraulic, electromagnetic type, comprising: - a body which is partially delimited, in its outer part, by a coil; - an inlet duct and an outlet duct opposite to said inlet duct obtained in said body; - a piston slidably placed inside the body; and - a magnetic sleeve having a first end placed inside said body in a part thereof facing the inlet duct and arranged coaxially to the sliding axis of the piston, said first end of said magnetic sleeve coupling to the body in an intermediate part thereof adjacent to a terminal part of the body defining the inlet duct, said magnetic sleeve interacting at least with the coil to increase the magnetic field and, therefore, the magnetic attraction force exerted on the piston; and, - noise-decreasing means operatively active and located at least between the magnetic sleeve, the piston and the body, Characterized in that said noise-decreasing means comprise: - a pair of opposite magnetic bearings (46, 46') spaced between themselves and placed between the body and said coil, said pair of opposite magnetic bearings (46, 46') being arranged coaxially to a sliding axis of the piston and interacting with the piston and/or the magnetic sleeve to increase the magnetic field and, therefore, the magnetic attraction exerted on the piston, said noise-decreasing means being operatively active also between the magnetic bearings (46, 46'), the magnetic sleeve and the piston; and - at least one active prevention assembly to actively prevent shocks and/or impacts, which is operatively active near at least one end of the piston to prevent material impacts or contacts with the body and/or the magnetic sleeve and/or magnetic bearings (46, 46'), said active prevention assembly being able to exploit vector variations of magnetic interactions between the piston and the body and/or between the piston and the magnetic sleeve and/or between the piston and the magnetic bearings (46, 46') suitable to slow down and/or brake the piston itself in correspondence of at least one threshold point of its stroke along the sliding axis. - a body which is partially delimited, in its outer part, by a coil; - an inlet duct and an outlet duct opposite to said inlet duct obtained in said body; - a piston slidably placed inside the body; and - a magnetic sleeve having a first end placed inside said body in a part thereof facing the inlet duct and arranged coaxially to the sliding axis of the piston, said first end of said magnetic sleeve coupling to the body in an intermediate part thereof adjacent to a terminal part of the body defining the inlet duct, said magnetic sleeve interacting at least with the coil to increase the magnetic field and, therefore, the magnetic attraction force exerted on the piston; and, - noise-decreasing means operatively active and located at least between the magnetic sleeve, the piston and the body, Characterized in that said noise-decreasing means comprise: - a pair of opposite magnetic bearings (46, 46') spaced between themselves and placed between the body and said coil, said pair of opposite magnetic bearings (46, 46') being arranged coaxially to a sliding axis of the piston and interacting with the piston and/or the magnetic sleeve to increase the magnetic field and, therefore, the magnetic attraction exerted on the piston, said noise-decreasing means being operatively active also between the magnetic bearings (46, 46'), the magnetic sleeve and the piston; and - at least one active prevention assembly to actively prevent shocks and/or impacts, which is operatively active near at least one end of the piston to prevent material impacts or contacts with the body and/or the magnetic sleeve and/or magnetic bearings (46, 46'), said active prevention assembly being able to exploit vector variations of magnetic interactions between the piston and the body and/or between the piston and the magnetic sleeve and/or between the piston and the magnetic bearings (46, 46') suitable to slow down and/or brake the piston itself in correspondence of at least one threshold point of its stroke along the sliding axis.