Acoustic sensor comprising: - an electroacoustic transducer comprising: a plate-shaped transducer element which is configured to emit an acoustic signal when excited by an electrical signal and to emit an electrical signal when excited by an acoustic signal, comprising: - a first surface, - a second surface which is arranged parallel to the first surface on a side of the plate-shaped transducer element opposite the first surface, and - a third surface which connects the first surface to the second surface of the transducer element, a first contact-making means which is arranged on at least one of the surfaces (2a, 2b, 2c) of the plate-shaped transducer element in such a manner that it has at least one portion which terminates flush with the outer periphery of the first or second surface (2a, 2b) of the plate-shaped transducer element or at least partially extends outside the outer periphery of the first or second surface (2a, 2b) of the plate-shaped transducer element, and - an electrical conductor which is configured to conduct the electrical signal, wherein the electrical conductor is a conductor track, - wherein the electrical conductor has a contact region which is in contact with an outer periphery of the first contact-making means, wherein the contact region of the electrical conductor is arranged in a plane defined by the first surface outside a region which overlaps the electroacoustic transducer, wherein the acoustic sensor comprises a printed circuit board and the electrical conductor is arranged on the printed circuit board, wherein the printed circuit board is arranged parallel to the first surface of the plate-shaped transducer element, wherein the printed circuit board is in a common plane with the plate-shaped transducer element, characterized in that the acoustic sensor comprises a membrane and the electroacoustic transducer is arranged on a surface of the membrane. - an electroacoustic transducer comprising: a plate-shaped transducer element which is configured to emit an acoustic signal when excited by an electrical signal and to emit an electrical signal when excited by an acoustic signal, comprising: - a first surface, - a second surface which is arranged parallel to the first surface on a side of the plate-shaped transducer element opposite the first surface, and - a third surface which connects the first surface to the second surface of the transducer element, a first contact-making means which is arranged on at least one of the surfaces (2a, 2b, 2c) of the plate-shaped transducer element in such a manner that it has at least one portion which terminates flush with the outer periphery of the first or second surface (2a, 2b) of the plate-shaped transducer element or at least partially extends outside the outer periphery of the first or second surface (2a, 2b) of the plate-shaped transducer element, and a plate-shaped transducer element which is configured to emit an acoustic signal when excited by an electrical signal and to emit an electrical signal when excited by an acoustic signal, comprising: - a first surface, - a second surface which is arranged parallel to the first surface on a side of the plate-shaped transducer element opposite the first surface, and - a third surface which connects the first surface to the second surface of the transducer element, - a first surface, - a second surface which is arranged parallel to the first surface on a side of the plate-shaped transducer element opposite the first surface, and - a third surface which connects the first surface to the second surface of the transducer element, a first contact-making means which is arranged on at least one of the surfaces (2a, 2b, 2c) of the plate-shaped transducer element in such a manner that it has at least one portion which terminates flush with the outer periphery of the first or second surface (2a, 2b) of the plate-shaped transducer element or at least partially extends outside the outer periphery of the first or second surface (2a, 2b) of the plate-shaped transducer element, and - an electrical conductor which is configured to conduct the electrical signal, wherein the electrical conductor is a conductor track, - wherein the electrical conductor has a contact region which is in contact with an outer periphery of the first contact-making means, wherein the contact region of the electrical conductor is arranged in a plane defined by the first surface outside a region which overlaps the electroacoustic transducer, wherein the acoustic sensor comprises a printed circuit board and the electrical conductor is arranged on the printed circuit board, wherein the printed circuit board is arranged parallel to the first surface of the plate-shaped transducer element, wherein the printed circuit board is in a common plane with the plate-shaped transducer element, characterized in that the acoustic sensor comprises a membrane and the electroacoustic transducer is arranged on a surface of the membrane.