An adjustable antenna assembly has an antenna bracket, an adjusting bracket and a supporting bracket. The cover 9 is strengthened in its edge area. 0 \u03bcm and a surface profile with an arithmetic average roughness Ra, a mean spacing between peaks Sm, and an average slope \u03b8a, all as measured in accordance with JIS B0601, satisfying the relationships to as defined herein. The microphone signals are filtered in relation to at least one filter transfer function, related to one or more filters. Thus, the system provides access to all database data in a manner that appears to the user as real time, while conserving resources at the user front end. A queue module stores data lengths and data start addresses of the first and second data segments.