Real Time Sound Field Simulator Using Field Programmable Gate Array Device

Abstract

Possibility of real time simulator of three-dimensional acoustic field in the time domain is discussed. Based on the discrete Huygens’ model (DHM), a digital equivalent circuit is developed. DHM elements are described by hardware description language (HDL) in the fixed-point arithmetic. It is estimated that the real time simulation of 1 m$³$ sound field is possible using ten-odd FPGA chips, while the CPU speed of 52 TFLOPS is required using the high performance computer. It is shown that data length of 28 bits is required for the practical accuracy. Based on FPGA-DHM, the real time simulator named “Silicon Concert Hall” may come true in the near future.