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随着音响技术的不断发展,近年来已相继出现了多种使用两只音箱实现3D环绕声的全新技术,如SRS,Q-Sound和Spatializer等。其中基于心理声学的SRS(Sound Retrieval System,声音恢复系统)环绕声由于可将记录在普通立体声信号中的3D声场完整逼真地再现出来,因而受到了众多计算机公司的重视和支持,目前已开始在多媒体计算机系统中迅速普及。 一、听觉定向机理 人类对声源方向的判别机理问题,不但涉及声波传播的物理过程,还涉及人类听觉系统的生理与心理因素,随着生理声学和心理声学的进步,对这些问题的研究已经取得了很大的进展。人类在辨别声音的方向时,主要依赖三种不同的定位方式:1.声音时间差;2.声音强度差;3.头部声音传递函数HRTF(Head Related Transfer Function)。 传统的声源定位理论主要基于声音时间差和声音强度差定位机理。声音时间差是指同一声音到达两只耳朵的相对时间差,声
With the continuous development of audio technology, in recent years, there have been many new technologies that use two speakers to achieve 3D surround sound, such as SRS, Q-Sound and Spatializer. Among them, psychoacoustic-based SRS (Surround Sound Retrieval System) surround sound has been valued and supported by many computer companies because it can completely reproduce the 3D sound field recorded in ordinary stereo signals. At present, Rapid popularization in multimedia computer system. First, the auditory orientation mechanism Human discrimination mechanism of the direction of the sound source, not only involves the physical process of sound waves, but also related to the human physical and psychological auditory system, with the progress of physiological and psychological acoustics, the study of these issues have been Great progress has been made. Human beings in the direction of the sound, mainly rely on three different positioning methods: 1. Sound time difference; 2. Poor sound intensity; 3. Head sound transfer function HRTF (Head Related Transfer Function). The traditional sound source localization theory is mainly based on the sound time difference and poor sound intensity positioning mechanism. Sound time difference refers to the same sound to reach the two ears of the relative time difference, sound