Research on Testing Methods for Automotive DAB Terminal Reception Performance

Current test methodologies for automotive audio broadcasting systems, particularly for DAB/FM reception performance, demonstrate significant limitations. Traditional overseas road test proves costly and exhibits low reproducibility of identified issues. Focusing on the core metric of reception sensitivity, this paper systematically establishes a comprehensive test framework spanning component-level (conductive method and subjective audio quality assessment), vehicle antenna-level (active reception sensitivity and EIS measurements), and vehicle audio-video integration levels. Vehicle test validation confirmed different methods effectively uncovered vehicle-level design flaws, including poor antenna directivity and uneven sensitivity distribution. Research results validate the effectiveness of the proposed comprehensive test methodology for DAB reception systems, providing automotive manufacturers with a reliable laboratory-based solution that significantly reduces dependency on field test.