The role of spread excitation and suppression in simultaneous masking.
The role of spread excitation and suppression in simultaneous masking.
复制标题
扩散激发和抑制在同时掩蔽中的作用。
DOI：
--
复制
发表时间：
1997
影响因子：
2.4
通讯作者：
D. Vickers
中科院分区：
文献类型：
--
作者：
B. Moore;D. Vickers
这个实验的目的是澄清的相对作用的传播的激励和抑制同时掩蔽，掩蔽频率低于和远低于信号频率。实验分为两个阶段。在第1阶段，增长的掩蔽功能进行了测量，同时掩蔽为2200 Hz的正弦信号和正弦掩蔽频率为1800 Hz或500 Hz。拟合这些数据的直线用于确定掩蔽水平，该掩蔽水平将提供10、20和30 dB的掩蔽。在阶段2中，使用前向掩蔽测量用于检测简短的2200 Hz信号的阈值。据推测，信号的阈值将指示掩蔽者在信号的频率区域中诱发的激励量。使用了三种正向掩蔽：（1）10、20或30 dB感觉水平（SL）的2200 Hz正弦波;（2）与（1）中相同水平的2200 Hz正弦波以及频率为500或1800 Hz的正弦波，其水平刚好足以掩蔽2200 Hz正弦波。我们称之为“组合掩蔽”，（3）500 Hz或1800 Hz正弦波，与上面（2）中的电平相同。1800 Hz组合掩蔽产生的前向掩蔽比2200 Hz掩蔽稍少（1），这可以用抑制或感知提示来解释。1800 Hz的组合掩蔽和单独的1800 Hz分量（3）都产生了大量的前向掩蔽（高达18 dB），表明这些掩蔽在2200 Hz产生了大量的激励。这是一致的想法，即在阶段1中的2200赫兹分量的同时屏蔽产生的激励的传播，而不是抑制。500-Hz组合掩蔽产生的前向掩蔽比单独的2200-Hz分量少得多，表明500-Hz分量对组合掩蔽的2200-Hz分量的强烈抑制。然而，500 Hz组合掩蔽和500 Hz分量单独产生一些前向掩蔽。这与第1级中2200 Hz分量的掩蔽（同时掩蔽）仅由抑制产生的想法不一致。
This experiment was intended to clarify the relative role of spread of excitation and suppression in simultaneous masking, for masker frequencies just below and well below the signal frequency. The experiment had two stages. In stage 1, growth-of-masking functions were measured in simultaneous masking for a 2200-Hz sinusoidal signal and a sinusoidal masker with frequency of either 1800 Hz or 500 Hz. Straight lines fitted to these data were used to determine masker levels that would give 10, 20, and 30 dB of masking. In stage 2, thresholds for detecting a brief 2200-Hz signal were measured using forward masking. It was reasoned that the threshold of the signal would give an indication of the amount of excitation evoked by the masker in the frequency region of the signal. Three forward maskers were used: (1) a 2200-Hz sinusoid at 10, 20, or 30 dB sensation level (SL); (2) a 2200-Hz sinusoid at the same levels as in (1) together with a sinusoid with frequency 500 or 1800 Hz at a level just sufficient to mask the 2200-Hz sinusoid. We refer to this as the "combined masker," (3) a 500-Hz or 1800-Hz sinusoid at the same levels as in (2) above. The 1800-Hz combined masker produced slightly less forward masking than the 2200-Hz masker (1), which might be explained in terms of suppression or as perceptual cueing. Both the 1800-Hz combined masker and the 1800-Hz component alone (3) gave significant amounts of forward masking (up to 18 dB), indicating that these maskers produced substantial excitation at 2200 Hz. This is consistent with the idea that the simultaneous masking of the 2200-Hz component in stage 1 was produced by spread of excitation rather than by suppression. The 500-Hz combined masker produced much less forward masking than the 2200-Hz component alone, indicating strong suppression of the 2200-Hz component of the combined masker by the 500-Hz component. However, both the 500-Hz combined masker and the 500-Hz component alone produced some forward masking. This is not consistent with the idea that masking of the 2200-Hz component in stage 1 (simultaneous masking) was produced solely by suppression.
听觉神经反应的抑制 I：时间分析、强度效应和抑制轮廓。
DOI：
10.1121/1.385953
发表时间：
1981
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
Javel,E
通讯作者：
Javel,E
影响因子：
2.4
作者：
DELGUTTE, B
通讯作者：
DELGUTTE, B