Evaluation of sound fields from loudspeaker arrays in television systems

Abstract This paper investigates the sound field generated by built-in loudspeakers in flat-panel televisions. An automated measurement rig was developed to capture full-azimuth impulse responses of a TV mock-up. The measured sound field is analysed in terms of directivity, insertion loss (IL), and the influence of edge diffraction. Simulations based on the Macdonald solution for edge diffraction are employed for comparison. Results show that the overall sound field is strongly shaped by cabinet-edge and panel-edge diffraction: IL increases with frequency, with close agreement between model and measurement above 2 kHz, while larger deviations appear at low frequencies. The study provides insights into how edges affect perceived sound quality and offers guidance for TV loudspeaker measurements and design.