A transducer device, in particular for measuring pressure fluctuations in a Kármán vortex street formed in a flowing fluid, wherein said transducer device comprises: - a deformation element, in particular exhibiting a membrane-like form at least in sections and/or a disk-shaped form at least in sections and/or a tubular form at least in sections and/or a metallic form, - a radio sensor positioned on and firmly bonded to the deformation element, in particular using adhesive, with a surface facing away from the deformation element, - as well as at least one transmitting and receiving device positioned at an, in particular fixed, distance from the radio sensor, in particular exhibiting an antenna and/or a wave guide; - wherein the transmitting and receiving device is configured to transform an applied electrical AC voltage into electromagnetic free-surface waves propagated in the direction of the radio sensor; - wherein the radio sensor is configured to receive electromagnetic free-surface waves and convert these into acoustic surface waves that are propagated along the surface facing away from the deformation element; - wherein the radio sensor is configured to convert acoustic surface waves being propagated along said surface into electromagnetic free-space waves; - and wherein the deformation element is configured to be deformed at least partially on the basis of a mechanical force acting on it, in particular a force that changes over time and/or is applied via a side of the deformation element facing away from the radio sensor, and/or on the basis of a temperature changes, in particular bent out of a static resting position and/or stretched in such a way that at least the surface of the radio sensor facing away from the deformation element experiences deformation, in particular deformation that changes over time and/or is reversible, that influences a propagation of acoustic surface waves propagating along said surface, in particular deformation that influences a propagation path and/or duration of acoustic surface waves propagating along said surface; - and wherein the transmitting and receiving device is configured to receive electromagnetic free-surface waves being emitted from the radio sensor and transform these into a cable-guided electrical AC voltage, characterized in that the transducer device also comprises: a fixture device that is formed using a connecting piece and mechanically connected to both the deformation element and the transmitting and receiving device for fixing a position and an orientation of the transmitting and receiving device relative to the deformation element, which is located in a static resting position, or the radio sensor that is connected to this. - a deformation element, in particular exhibiting a membrane-like form at least in sections and/or a disk-shaped form at least in sections and/or a tubular form at least in sections and/or a metallic form, - a radio sensor positioned on and firmly bonded to the deformation element, in particular using adhesive, with a surface facing away from the deformation element, - as well as at least one transmitting and receiving device positioned at an, in particular fixed, distance from the radio sensor, in particular exhibiting an antenna and/or a wave guide; - wherein the transmitting and receiving device is configured to transform an applied electrical AC voltage into electromagnetic free-surface waves propagated in the direction of the radio sensor; - wherein the radio sensor is configured to receive electromagnetic free-surface waves and convert these into acoustic surface waves that are propagated along the surface facing away from the deformation element; - wherein the radio sensor is configured to convert acoustic surface waves being propagated along said surface into electromagnetic free-space waves; - and wherein the deformation element is configured to be deformed at least partially on the basis of a mechanical force acting on it, in particular a force that changes over time and/or is applied via a side of the deformation element facing away from the radio sensor, and/or on the basis of a temperature changes, in particular bent out of a static resting position and/or stretched in such a way that at least the surface of the radio sensor facing away from the deformation element experiences deformation, in particular deformation that changes over time and/or is reversible, that influences a propagation of acoustic surface waves propagating along said surface, in particular deformation that influences a propagation path and/or duration of acoustic surface waves propagating along said surface; - and wherein the transmitting and receiving device is configured to receive electromagnetic free-surface waves being emitted from the radio sensor and transform these into a cable-guided electrical AC voltage, characterized in that the transducer device also comprises: a fixture device that is formed using a connecting piece and mechanically connected to both the deformation element and the transmitting and receiving device for fixing a position and an orientation of the transmitting and receiving device relative to the deformation element, which is located in a static resting position, or the radio sensor that is connected to this.