Abstract: A generator for generating energy from a moving fluid, the generator including a duct of walls that include two faceplates (1) between which a diaphragm (5) is placed so as to be subjected to the action of a stream of fluid penetrating between the two faceplates, wherein the two faceplates diverge so as to cause the diaphragm to deform under the action of a stream of fluid in the form of a traveling wave that moves from a leading edge (6) of the diaphragm towards a trailing edge (7) of the diaphragm so that the trailing edge of the diaphragm is driven with transverse oscillating motion, elements (11, 12) for making use of the motion being coupled to the trailing edge.