Abstract: In a hearing aid with a directional microphone system having a signal processing unit, an earphone and a number of microphones, the output signals of the respective microphones can be interconnected with one another with different weightings for generating an individual directional microphones characteristic by using one or more delay elements and the signal processing unit. The invention is also directed to a method for the operation of such a hearing aid.

Abstract: A hearing aid that has an analog part with a Class D final amplifier stage for audio signal processing, a digital part with an interface, a memory stage as well as supply stage for generating the voltage and control signals. The hearing aid has a utilized integrated circuit which also includes a pre-amplifier stage with two inputs respectively connected to a microphone and a telephone coil, the signals from the two inputs being selectively pre-amplified individually or in common, with selectable or programmable gains. This gives the hearing aid a small structural size, a comprehensive functionality, versatile adaptability and especially low energy consumption.

Abstract: Resiliently deformable safety covering tiles have a base 2 made of rigid material such as concrete, and a cover body 3 provided on the top side of the base made of resiliently deformable material such as rubber. These safety covering tiles should be easy to lay while exhibiting no corrugation or bulging on their top side 5 during changes in temperature. To achieve this, on a continuous edge portion 10 of a covering tile portion 4 of the cover 3, at the height of a ledge 15 of the base 2, one or more lateral projections 18 are distributed over the periphery of the cover. The continuous edge portion 10 has a gap-forming reduced portion 19 at the height of spacers 7 and of the covering tile 4 and has at the height of the spacers 7 a reduced cross-section 22 which permits lateral movements.