流体解析・音響解析ソフトウェアの連成による非線形音響解析手法開発の基礎検討

抄録

In recent years, ultrasonic speakers, which are used as a foundational technology for three-dimensional acoustics, have the advantage of extremely high directivity due to the use of ultrasonic waves as the carrier wave. However, a challenge arises in the form of sound quality degradation due to waveform distortion during demodulation. Therefore, in this study, we conducted a fundamental examination aimed at establishing a design method for high-quality reproduced sound. This was achieved by connecting linear wave acoustic phenomena and fluid phenomena through a partitioned iterative coupling algorithm, thereby reproducing nonlinear acoustic phenomena in large spaces without solving the memory-intensive Westervelt equation required for large-scale analysis using the finite element method.