LEVEL EFFECTS IN PSYCHOPHYSICAL 2-TONE SUPPRESSION
LEVEL EFFECTS IN PSYCHOPHYSICAL 2-TONE SUPPRESSION
复制标题
DOI：
10.1121/1.383971
复制
发表时间：
1980-01-01
影响因子：
2.4
通讯作者：
DUIFHUIS, H
中科院分区：
文献类型：
--
作者：
DUIFHUIS, H
测量心理物理2音抑制在一些人类受试者的描述。刺激成分的水平（受抑制者，L1和抑制，L2）是主要变量。脉动阈值总是与固定在被抑制频率f1的探头频率fp一起使用。f1最初固定在1 kHz。抑制器频率f2的范围为0.2-1.4 kHz。在适当的水平下，所有受试者均表现出显著的抑制。当f2接近f1时，抑制降低到0。抑制的量取决于L1和L2的方式不同于任何目前的双音抑制理论。在更高的总体水平上，抑制变得越来越突出。在给定的刺激条件下，双音抑制的量强烈依赖于受试者。测得的最大抑制量约为35 dB。在其他频率f1（0.5、2和4 kHz）下，抑制遵循相同的模式。相同的f2/f1比率非常相似。在嘈杂的环境中，2音抑制效果下降。在20 dB的信噪比范围内，噪声的影响从可忽略不计变为几乎完全消除2音抑制。
Measurements of psychophysical 2-tone suppression in a number of human subjects are described. Levels of the stimulus components (suppressee, L1, and suppressor, L2) were the primary variables. The pulsation threshold was always used with the probe frequency fp fixed at the suppressee frequency f1. f1 was initially fixed at 1 kHz. The suppressor frequency f2 ranged from 0.2-1.4 kHz. At appropriate levels all subjects showed significant suppression. Suppression decreased to 0 as f2 approached f1. The amount of suppression depended on L1 and L2 in a way different from any of the current theories of 2-tone suppression. At higher overall levels suppression became increasingly prominent. The amount of 2-tone suppression in a given stimulus condition depended strongly on the subject. The maximum amount of suppression measured was about 35 dB. Suppression followed the same pattern at other frequencies f1 (0.5, 2 and 4 kHz). The equal f2/f1 ratios were quite similar. The 2-tone suppression effect decreased in a noisy environment. Within a 20-dB range of signal-to-noise ratios the effect of noise changed from negligible to the virtually complete elimination of 2-tone suppression.