A diaphragm type game call has at least one diaphragm mounted in a frame in such a way that the diaphragm cooperate with a part or parts of the frame to permit the tension of the diaphragm to be varied selectively, as by fixing the initial effective length of the diaphragm at the outboard edge of a leg of a U-shaped frame whereby the inboard edge serves as a fret of sorts to shorten the effective length of the diaphragm when the diaphragm is pushed against it by the tongue of the user, or by providing a fret intermediate the length of the diaphragm, or by providing one or both legs of a frame with channels into which and from which a diaphragm can be readily mounted and demounted to permit the selective tensioning of the diaphragm so mounted.