Department of Otolaryngology/Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA.
Adv Exp Med Biol. 2013;787:383-90. doi: 10.1007/978-1-4614-1590-9_42.
This study investigated monaural envelope correlation perception (Richards 1987) for noise bandwidths ranging from 25 to 1,600 Hz. The high-frequency side of the low band was fixed at 3,000 Hz and the low-frequency side of the high band was fixed at 3,500 Hz. When comodulated, the magnitude spectra of the pair of noise bands were either identical or reflected around the midpoint. Six listeners with normal hearing participated. Listeners showed similar performance for identical and reflected-spectrum conditions, with best performance usually occurring for bandwidths between 200 and 800 Hz. Results were considered in terms of envelope comparisons of waveforms at the outputs of multiple peripheral filters or envelope comparisons of waveforms at the outputs of central filters set to the bandwidths of the noise stimuli. Some aspects of the results were incompatible with the account based on multiple peripheral filters. However, the results of a supplementary condition involving the gating of band subregions indicated that this incompatibility could be accounted for by nonoptimal weighting of peripheral filter outputs.
本研究调查了从 25 到 1600Hz 的噪声带宽的单耳包络相关感知（Richards 1987）。低频带的高频侧固定在 3000Hz，高频带的低频侧固定在 3500Hz。当共调制时，一对噪声带的幅度谱要么相同，要么在中点处反射。六名听力正常的听众参与了研究。听众在相同和反射谱条件下表现出相似的性能，最佳性能通常出现在 200 到 800Hz 之间的带宽。研究结果根据多个外围滤波器输出处的波形的包络比较或设置为噪声刺激带宽的中央滤波器输出处的波形的包络比较来考虑。结果的某些方面与基于多个外围滤波器的解释不兼容。然而，涉及带分区门控的补充条件的结果表明，这种不兼容性可以通过外围滤波器输出的非最优加权来解释。
