Abstract: An acoustic transducer, in particular for an ultrasonic sensor, is proposed. The acoustic transducer has a functional group, the functional group encompassing a diaphragm cup and at least one electroacoustic transducer element. The acoustic transducer furthermore has a housing. The diaphragm cup encompasses a vibration-capable diaphragm and an encircling wall, as well as at least one electroacoustic transducer element, the transducer element being embodied to excite the diaphragm to vibrate and/or to convert vibrations of the diaphragm into electrical signals. The diaphragm cup is constituted from a plastic material, the at least one transducer element being integrated into the vibration-capable diaphragm, the transducer element having an electrically active polymer.

Abstract: A sound transducer, in particular, for an ultrasonic sensor, includes a functional group, the functional group including a diaphragm cup and at least one electroacoustic transducer element. The sound transducer also includes a housing. The diaphragm cup includes a vibratory diaphragm and a circumferential wall, and at least one electroacoustic transducer element, the transducer element being configured to stimulate the diaphragm to vibrate and/or to convert vibrations of the diaphragm into electrical signals. The diaphragm cup is formed from a plastic material, the at least one transducer element being integrated into the vibratory diaphragm, in particular without an additional adhesive layer, the transducer element including a piezoceramic element.

Abstract: A sound transducer has a diaphragm cup, a transducer element, and a housing, the diaphragm cup having a diaphragm and a wall. The diaphragm, the wall, and at least one housing part are formed in one piece as a fiber-plastic composite component. At least one first region of the fiber-plastic composite component is reinforced with fibers, and at least one second region of the fiber-plastic composite component is free of fibers, so that waves in the fiber-plastic composite component are at least partly reflected at a transition from the at least one first region to the at least one second region.

Abstract: A sound transducer has a diaphragm cup, a transducer element, and a housing, the diaphragm cup having a diaphragm and a wall. The diaphragm, the wall, and at least one housing part are formed in one piece as a fiber-plastic composite component. At least one first region of the fiber-plastic composite component is reinforced with fibers, and at least one second region of the fiber-plastic composite component is free of fibers, so that waves in the fiber-plastic composite component are at least partly reflected at a transition from the at least one first region to the at least one second region.

Abstract: A sound transducer, in particular, for an ultrasonic sensor, includes a functional group, the functional group including a diaphragm cup and at least one electroacoustic transducer element. The sound transducer also includes a housing. The diaphragm cup includes a vibratory diaphragm and a circumferential wall, and at least one electroacoustic transducer element, the transducer element being configured to stimulate the diaphragm to vibrate and/or to convert vibrations of the diaphragm into electrical signals. The diaphragm cup is formed from a plastic material, the at least one transducer element being integrated into the vibratory diaphragm, in particular without an additional adhesive layer, the transducer element including a piezoceramic element.

Abstract: A sound transducer, which includes a diaphragm cup, a transducer element, and a housing. The diaphragm cup includes a diaphragm and a wall. The diaphragm, the wall of the diaphragm cup, and at least a part of the housing are formed in one piece from a plastic. In at least one first area of the diaphragm cup, the plastic is filled with a first filler. An ultrasonic sensor including the sound transducer is also provided.

Abstract: A sound transducer, in particular for an ultrasonic sensor, is described, which includes a housing, at least one decoupling element and a functional group. The functional group includes a diaphragm cup and at least one electroacoustic converter element. The diaphragm cup includes a vibratable diaphragm and a circumferential wall as well as at least one electroacoustic converter element, the converter element being configured to excite the diaphragm to vibrations and/or to convert vibrations of the diaphragm into electrical signals. The diaphragm cup and at least one part of the housing are made from a plastic material. The decoupling element is configured to vibration-mechanically decouple the diaphragm cup and/or the at least one part of the housing from outer surroundings of the sound transducer. The decoupling element is integrated into the diaphragm cup, in particular into the wall of the diaphragm cup, and/or the at least one part of the housing.

Abstract: An ultrasonic sensor includes a housing encompassing a circumferential side wall. The ultrasonic sensor includes a transducer element to convert an incoming ultrasonic signal into a detectable electrical signal, or conversely, to convert an electrical signal into an ultrasonic signal to be emitted. The ultrasonic sensor includes an oscillatable diaphragm connected to the housing. A multitude of mass elements are situated on a surface of the diaphragm. Alternatively or in addition, a multitude of mass elements are situated within the diaphragm. The mass elements form an acoustic meta material, which is a stop band material, band gap material or phononic crystal and which has a resonant behavior within a frequency band. A resonance frequency of the diaphragm including the multitude of mass elements situated on and/or within the diaphragm is within the frequency band at which the mass elements exhibit a resonant behavior.

Abstract: An acoustic transducer, in particular for an ultrasonic sensor, is proposed. The acoustic transducer has a functional group, the functional group encompassing a diaphragm cup and at least one electroacoustic transducer element. The acoustic transducer furthermore has a housing. The diaphragm cup encompasses a vibration-capable diaphragm and an encircling wall, as well as at least one electroacoustic transducer element, the transducer element being embodied to excite the diaphragm to vibrate and/or to convert vibrations of the diaphragm into electrical signals. The diaphragm cup is constituted from a plastic material, the at least one transducer element being integrated into the vibration-capable diaphragm, the transducer element having an electrically active polymer.