Abstract: Transducer element (1) based on dielectric elastomers, including a carrier board (2), wherein the carrier board has first contact surfaces (6) which are conductively connected to a first connector contact (7), and second contact surfaces (9) which are conductively connected to a second connector contact (10). The transducer element (1) also includes at least one elastomer film (3), consisting of a dielectric material, at least two electrodes (4), wherein the electrodes are at least partially air-permeable and each have at least one contact surface (15) for conductively connecting to the first or second contact surfaces of the carrier board. The at least two electrodes (4) and the at least one elastomer film (3) are arranged on the carrier board (2) so that a stack is formed, in which the electrodes (4) and elastomer films (3) are arranged alternately, and the electrodes (4) are conductively connected alternately to the first contact surfaces (6) and the second contact surfaces (9) of the carrier board (2).

Abstract: An apparatus for speech detection is positionable on or close to a head of a speaking person. The apparatus includes an inner side and an outer side. The apparatus includes a speech detection region including a microphone. At least sections of the microphone face or form the inner side. The apparatus includes a silencer. At least part of the silencer faces or forms the outer side. The silencer has a front facing the person, a rear, and a silencer structure. At least part of the silencer structure extends between the front and the rear. The silencer includes at least one of (a) a vibroacoustic region and (b) at least in sections, a fibrous surface texture at the front with a plurality of protruding fibrous material sections.

Abstract: A device for reducing vibrations in a hydraulic system may have a separating device which has a side for delimiting a fluid-conducting cavity of the fluid system. The device may also have a vibration-reducing unit, which is designed to mechanically adjust the rigidity of the separating device such that vibrations in the fluid system are reduced.

Abstract: An apparatus for speech detection is positionable on or close to a head of a speaking person. The apparatus includes an inner side and an outer side. The apparatus includes a speech detection region including a microphone. At least sections of the microphone face or form the inner side. The apparatus includes a silencer. At least part of the silencer faces or forms the outer side. The silencer has a front facing the person, a rear, and a silencer structure. At least part of the silencer structure extends between the front and the rear. The silencer includes at least one of (a) a vibroacoustic region and (b) at least in sections, a fibrous surface texture at the front with a plurality of protruding fibrous material sections.