The invention relates to a surface layer which comprises a plurality of layers, of which one layer is a ceramic wear-resistant layer and another layer is a transition layer to a metallic substrate element. For a given time, an instantaneous estimate of a position of a wanted sound source andor of a direction of arrival of a signal originating from the wanted sound source is determined. The image capture device further includes a plurality of third capacitor elements configured to hold signals from the differential amplifiers of the plurality of processing circuits and to limit an output frequency band of each differential amplifier, and a horizontal output line for sequentially outputting signals from the plurality of third capacitor elements. The web server generates web pages in an appropriate form for each user device without the need to convert web pages from one form to another. This report is transmitted to the troubleshooting engine, which directs a multimedia application to transmit diagnosis and repair instructions to a service center technician.