频谱权重函数用于局部化复杂的声音. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. 竞争噪音的影响
Monica L Folkerts1, Erin M Picou2, G Christopher Stecker3
1Department of Otolaryngology-Head and Neck Surgery, University of North Carolina at Chapel Hill, 170 Manning Drive, Chapel Hill, North Carolina 27599-7070, USA.
在竞争噪声中,声音定位的光谱权重转移到较低的频率. 这发生在间隔时差 (ITD) 主导区域内,有利于更少的中断低频线索.
科学领域:
- 声学 声学 声学 声学
- 听觉感知是一种听觉感知.
- 精神声学是一种精神声学.
背景情况:
- 声音定位依赖于听觉线索的光谱权重.
- 之前的研究发现了一个间隔时差 (ITD) 主导区域,在安静的情况下达到800 Hz的峰值.
- 对光谱权重和ITD主导区域的竞争性噪声影响需要进一步调查.
研究的目的:
- 在不同水平的竞争噪音下测量声音定位线索的光谱权重.
- 为了确定竞争噪声如何影响收到最大的感知权重定位的频率区域.
主要方法:
- 复杂的音调与七个音调组成部分从前方方位呈现出来.
- 竞争的高斯式噪声从左和右的光线向下呈现,信号与噪声的比率为 (+9,0, -6 dB).
- 通过测量不同频率组件的感知重量来评估光谱权重.
主要成果:
- 在所有竞争的噪音条件下,最大的感知重量转向低频组件 (例如400 Hz).
- 这种转变与基于以前的行为本地化数据的假设相矛盾,这些数据表明更高频率的转变.
- 在主导区域内的低频ITD线索受到竞争噪声的影响最小.
结论:
- 竞争的噪音改变了声音定位的光谱权重,有利于ITD主导区域内的较低频率.
- 这些发现与双耳暗示灵敏度和可靠性一致,表明低频ITD在噪音中更强大.
- 这挑战了以前对行为本地化表现的解释,并强调了在噪音中提示可用性的重要性.
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