Three-Dimensional Auralization of Orchestral Performance Based on 1:10 Scale Model

This study introduced laser-induced acoustic pulses as sound sources for 1:10 scale model experiments in concert halls. These pulses exhibit high sound pressure, excellent reproducibility, short transient response, and broadband frequency range up to 100 kHz, including instrumental harmonics, making them suitable as sound sources for auralization. To measure three-dimensional sound fields in the scale model, a single microphone was sequentially moved to multiple locations on virtual spherical surfaces with radii of a few millimeters, centered at the receiving point, and room impulse responses were measured at each location. To improve both sound quality and spatial resolution during playback, measurements were performed on three concentric virtual spherical surfaces with different radii, creating fourth-order ambisonics signals covering the audible range from 50 Hz to 10 kHz. This approach ensured sound reproduction and clear sound localization compared to conventional methods, thus enabling high-quality auralization of orchestral performances using 1:10 scale models.