Binaural versus monaural loudness: supersummation of tone partially masked by noise.
Binaural versus monaural loudness: supersummation of tone partially masked by noise.
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双耳响度与单耳响度：部分被噪声掩盖的音调的叠加。
DOI：
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发表时间：
1987
影响因子：
2.4
通讯作者：
L. Marks
中科院分区：
文献类型：
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作者：
L. Marks
一系列的三个实验使用幅度估计的方法来检验在安静的环境中和在不同的掩蔽噪声背景下听到的1000赫兹音调的响度的双耳总和。在静音中，双耳的响度是单耳响度的两倍。噪声掩蔽的两种情况使Sones的双耳/单耳响度比增加到2：1以上，即产生超饱和。(1)当双耳同时听音，但只对一耳掩蔽噪声时(双耳刺激)，双耳音调的响度比单耳各分量的响度之和大30%~35%。这种总和的增加提供了一种阈值上的类似于用双眼刺激观察到的阈值敏感度的增加(掩蔽水平差异)。(2)当双耳同时出现音调和噪声时(双耳刺激)，双耳音调的响度比单耳各分量之和大10%-25%。双耳刺激时总和的增加可能与噪声掩蔽器本身的双耳总和的特点有关。
A series of three experiments used the method of magnitude estimation to examine binaural summation of the loudness of a 1000-Hz tone heard in the quiet and against various backgrounds of masking noise. In the quiet, binaural loudness as measured in sones, is twice monaural loudness. Two conditions of noise masking acted to increase the ratio of binaural/monaural loudness in sones above 2:1--that is, to produce supersummation. (1) When tone was presented to both ears, but masking noise to just one ear (dichotic stimulation), the loudness of the binaural tone was 30%-35% greater than the sum of the loudness of the monaural components. This increase in summation provides a suprathreshold analog to increases in threshold sensitivity observed with dichotic stimulation (masking-level differences). (2) Supersummation was also evident when tone and noise alike were presented to both ears (diotic stimulation); here, the binaural tone's loudness was 10%-25% greater than the sum of the monaural components. The increase in summation with diotic stimulation may be related to the characteristics of binaural summation of the noise masker itself.