Real Environment Performance of Recording System for Personal 3D Sound Field Reproduction Using Hyperdirectional Microphones and Wave Front Synthesis

Abstract

This study presents a recording system utilizing an array of eight hyperdirectional microphones designed for personal three-dimensional (3D) sound field reproduction via wave front synthesis. The recording positions of the hyperdirectional microphones were identified through impulse response measurement, enabling microphone array construction. To evaluate the localization performance of the constructed microphone array, the impulse responses were measured, replay sounds were synthesized, and the localization experiment was performed. Results demonstrated that the developed recording system outperformed ambisonic microphone, a standard conventional 3D sound field recording, in localization accuracy.