Low Power DSP Implementation of 3D Sound Localization for Monaural Sound Source

摘要

This paper describes a DSP implementation of a real-time 3D sound localization algorithm with the use of a low power embedded DSP. A distinctive feature of this implementation is that the audible frequency band is divided into three, in accordance with the sound reflection and diffraction phenomena through different media from a certain sound source to human ears, and then in each subband a specific implementation procedure of the 3D sound localization is devised so as to operate in real-time at a low frequency of 50 MHz on a 16-bit fixed-point DSP. This algorithm aims at providing a listener with virtual 3D sound effects through a headphone at low cost and low power consumption.