声刺激重放方式对优先效应回声阈值的影响  

Effect of sound stimuli presentation method on echo threshold of precedence effect

作　　者：曹腾 余光正 饶丹 CAO Teng;YU Guangzheng;RAO Dan(Acoustic Lab.,School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510641)

机构地区：[1]华南理工大学物理与光电学院声学研究所,广州510641

出　　处：《声学学报》2024年第6期1206-1214,共9页Acta Acustica

基　　金：国家自然科学基金项目(12074129);广东省自然科学基金项目(2024A1515011446)资助。

摘　　要：针对优先效应研究中三种常见的声刺激重放方式对回声阈值的影响,开展了心理声学实验研究,同时测量了三种刺激条件下(基准、建立和破坏)四种类型刺激信号(噪声脉冲、语音、音乐和粉红噪声)的回声阈值。结果表明,耳机虚拟听觉空间法与扬声器重放法在回声阈值上没有显著差异,而它们的回声阈值与耳机双耳时间差法都存在显著差异,主要体现在长时刺激上。可能的原因是不同重放方式的空间定位因素差异。此外,随着刺激条件的变化(从基准、建立到破坏),三种刺激重放方式的动态回声阈值变化规律一致,即噪声脉冲刺激的回声阈值先增加后降低,三种长时刺激的回声阈值均未出现显著变化。A psychoacoustic experiment is conducted to investigate the effect of three common sound stimuli presentation methods on echo threshold(ET)of precedence effect.The ETs of four types of stimulus(noise burst,speech,music,pink noise)under three stimuli conditions(Baseline,Buildup,Breakdown)are measured.The results show that the ETs of headphone-based virtual auditory space(VAS)presentation method and loudspeaker-based presentation method have no significant difference,while ETs of them are all significantly different from those of the interaural time difference(ITD)method,especially for long-duration stimuli.The possible reason is the differences in localization cues between various stimulus presentation methods.In addition,with the change of stimuli conditions(from Baseline,Buildup to Breakdown),the dynamic changes of ETs under three stimuli presentation methods are the same,that is,the ETs of the noise burst increase first and then decrease,and the ETs of the three long-duration stimuli do not show significant changes.

关 键 词：优先效应 回声阈值 声刺激重放方式 定位因素 

分 类 号：TN912[电子电信—通信与信息系统]