Abstract: The present invention refers to a loudspeaker. Soundwaves generated by a loudspeaker according to the prior art are emitted into a room or into the surrounding space in a predetermined geometric structure. It is a task of the present invention to provide a loudspeaker, which has an improved spatial acoustic performance. According to an embodiment of the invention, the loudspeaker comprises a housing, at least one driver arrangement and a mounting device including a movable mechanism for mounting the driver arrangement to the housing. The driver arrangement comprises at least one electroacoustic driver. With the help of the mounting device the driver arrangement is mounted to the housing in different predetermined positions, wherein the mounting device is adapted such, that the driver arrangement can be arranged in at least a first position and at least a second position with respect to the housing.

Abstract: The present invention refers to a loudspeaker, in especially to a bass reflex tube for a loudspeaker. Commonly, said loudspeakers include at least one woofer driver, by which an electric audio signal is transduced via a voice coil and a diaphragm into soundwaves of medium to low frequency. A bass reflex tube for a loudspeaker should be provided, which enables said loudspeaker to produce an acoustic signal according to an electrical signal, wherein the acoustic signal shows optimized an improved quality characteristics, in especially with regards to quality and accuracy of the conversion of electrical signal into the acoustic signal. The problem mentioned above is solved by a bass reflex tube for a loudspeaker, wherein said bass reflex tube is at least partially made of a ceramic material. Further, the bass reflex tube comprises a tubular portion, which is extending in an axial direction of a longitudinal axis of the bass reflex tube.

Abstract: The present invention refers to a loudspeaker. Soundwaves generated by a loudspeaker according to the prior art are emitted into a room or into the surrounding space in a predetermined geometric structure. It is a task of the present invention to provide a loudspeaker, which has an improved spatial acoustic performance. According to an embodiment of the invention, the loudspeaker comprises a housing, at least one driver arrangement and a mounting device including a movable mechanism for mounting the driver arrangement to the housing. The driver arrangement comprises at least one electroacoustic driver. With the help of the mounting device the driver arrangement is mounted to the housing in different predetermined positions, wherein the mounting device is adapted such, that the driver arrangement can be arranged in at least a first position and at least a second position with respect to the housing.

Abstract: The present invention refers to a loudspeaker, in especially to a bass reflex tube for a loudspeaker. Commonly, said loudspeakers include at least one woofer driver, by which an electric audio signal is transduced via a voice coil and a diaphragm into soundwaves of medium to low frequency. A bass reflex tube for a loudspeaker should be provided, which enables said loudspeaker to produce an acoustic signal according to an electrical signal, wherein the acoustic signal shows optimized an improved quality characteristics, in especially with regards to quality and accuracy of the conversion of electrical signal into the acoustic signal. The problem mentioned above is solved by a bass reflex tube for a loudspeaker, wherein said bass reflex tube is at least partially made of a ceramic material. Further, the bass reflex tube comprises a tubular portion, which is extending in an axial direction of a longitudinal axis of the bass reflex tube.

Abstract: A leakage monitoring system is provided for space-enclosing objects, such as pipes, hoses or containers having an exterior wall. The leakage monitoring system includes at least one electrically conductive element that acts as a leakage sensor and is mounted on the exterior wall or integrated therein. In order to make simple and reliable monitoring of imminent or already occurring leakages possible, even for extensive wall regions, and specifically in as universal a manner as possible for different types of media, the electrically conductive element is a component of a measuring bridge which contains a device for evaluating the bridge voltage and which is powered by a voltage source has an operating voltage containing both AC voltage components and DC voltage components.

Abstract: The apparatus checks the functionality of an electrical drive and/or of a mechanical device associated with the electrical drive. The mechanical device may be an accessory or an actuating element. An electrical unit is associated with the drive and/or with the mechanical device. The unit has connections to which a diagnosis module can be connected. A power supply device is provided for the diagnosis module which can be activated via at least one of the connections to the unit, or via an external signal.

Abstract: A method and an apparatus are provided for checking a plurality of electrical drive mechanisms which may, in particular, be drive mechanisms for railroad switches. Measured values are picked up at the same time at the plurality of electrical drive mechanisms, and the signals describing them are provided with a drive mechanism-specific identifier. These thus-identified signals are then carried without interruption, on-line, to a data processing system, where they are compared with desired values that are available there. If a signal deviates from a desired value, an error is indicated for the particular drive mechanism at which the signal originated.