A Fast Water Droplet Sound Simulation

Due to recent advances in the field of virtual reality, the demand for immersive sound design has increased dramatically. While pre-recorded samples are a popular tool in this context, it has limited flexibility and user interactivity. We propose a real-time method that can synthesize fully immersive sounds of droplets falling in water. The physics of air bubbles produced in the liquid are considered in detail, and the sound samples are synthesized in a GLSL shader to make full use of parallel computing. A vertex shader shows the resulting disturbance on the liquid surface, to further immerse the user with consistent visuals. Results show that a large amount of bubbles can easily be generated on a regular desktop computer.