Construction method and application of independent acoustic space based on phased array directional sound technology

To address personalized consumer demands and create mutually independent acoustic environments between seats within automotive cabins, this paper proposes a method for constructing independent acoustic spaces based on phased array directional sound technology, and investigates its application in vehicle cabins. First, three key parameters influencing the acoustic performance of independent spaces-sound source distance, partition spacing, and beam width-were selected based on fundamental acoustics theory. Next, phased-array technology was applied in conjunction with the Westervelt equation, incorporating a phase correction factor, to simulate and validate the radiation distribution of the directional sound source. Subsequently, the geometric regions of the independent acoustic spaces were delineated according to ergonomic principles. The impact of key parameters on acoustic performance was analyzed across diverse vehicle models and user scenarios (driver/passenger requirements). Finally, simulations and analysis of the independent acoustic space were completed. A full-scale cabin test platform based on an actual vehicle model was built to perform bench tests and real-vehicle validation. Combined subjective and objective evaluations confirmed the effectiveness of the proposed method, thereby providing both a theoretical foundation and practical guidance for the application of directional sound technology in vehicles. This work also suggests a new technical pathway for personalized control of the automotive acoustic environment.