Hall J W, Harvey A D
J Acoust Soc Am. 1984 Dec;76(6):1699-703. doi: 10.1121/1.391616.
NoSo and NoS pi thresholds for a 500-Hz signal were determined as a function of masker level for masking noises having 600- and 50-Hz bandwidths centered on 500 Hz. Noise levels of 0, 10, 20, 30, 40, 50, and 60 dB/Hz were used for the 600-Hz bandwidth, and noise levels of 0, 10, 20, 30, 40, 50, 60, and 70 dB/Hz were used for the 50-Hz bandwidth. The So thresholds increased as a function of increasing noise level with a slope close to 1.0, for both the 50- and 600-Hz masker bandwidths. For the 600-Hz-wide masker, the S pi thresholds increased with a slope less than 1.0 for masker levels from 0 dB/Hz to approximately 20 dB/Hz, but increased with a slope close to 1.0 for masker levels above approximately 20 dB/Hz. For the 50-Hz-wide masker, the S pi thresholds increased with a slope less than 1.0 for masker levels from 0 dB/Hz to approximately 40 dB/Hz, but increased with a slope close to 1.0 for masker levels above approximately 40 dB/Hz. The results are discussed in terms of different binaural processes involving interaction between monaural critical bands centered on the signal frequency, and interaction involving monaural critical bands outside the monaural critical band centered on the signal. It was suggested that the narrow-band noise results are probably more appropriate than the wideband noise results when considering binaural interaction involving monaural critical bands centered on the signal frequency.
针对以500赫兹为中心、带宽分别为600赫兹和50赫兹的掩蔽噪声，确定了500赫兹信号的NoSo和NoS π阈值与掩蔽声级的函数关系。对于600赫兹带宽的噪声，使用了0、10、20、30、40、50和60分贝/赫兹的噪声水平；对于50赫兹带宽的噪声，使用了0、10、20、30、40、50、60和70分贝/赫兹的噪声水平。对于50赫兹和600赫兹的掩蔽声带宽，So阈值均随噪声水平的增加而增加，斜率接近1.0。对于600赫兹宽的掩蔽声，在掩蔽声级从0分贝/赫兹到约20分贝/赫兹时，S π阈值的增加斜率小于1.0，但在掩蔽声级高于约20分贝/赫兹时，增加斜率接近1.0。对于50赫兹宽的掩蔽声，在掩蔽声级从0分贝/赫兹到约40分贝/赫兹时，S π阈值的增加斜率小于1.0，但在掩蔽声级高于约40分贝/赫兹时，增加斜率接近1.0。根据涉及以信号频率为中心的单耳临界带之间相互作用以及涉及以信号为中心的单耳临界带之外的单耳临界带之间相互作用的不同双耳过程对结果进行了讨论。有人提出，在考虑涉及以信号频率为中心的单耳临界带的双耳相互作用时，窄带噪声结果可能比宽带噪声结果更合适。
