共查询到19条相似文献，搜索用时 187 毫秒
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掩蔽效应（Masking Effect）是人的听觉和视觉系统分别对于声音和图像的自然生理反应现象,主要表现为强刺激对弱刺激的掩蔽作用。在实现异构设备之间通信时,意外地发现了电信号之间同样存在类似“掩蔽效应”的问题。为此,进行了针对性的实验研究,并给出了解决问题的建议。 相似文献
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形声兼备,视听结合,是电视新闻的特性。而电视节目的声画结合,在电视新闻中则起着决定性作用。要达到最佳效果,一是要对声音语言和画面语言有正确的认识;二是要处理好声画语言的组合关系。 相似文献
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有声电影的产生,开创了电影发展的新纪元,声音在电影中的运用对于一部电影的成功起着极大的作用.而"人物语言"作为电影声音语言的一个重要元素,其重要性更是不言而喻.本文作者结合影片<永不妥协>中几段精彩的人物对白来具体阐述此部电影中人物语言的独特魅力. 相似文献
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崔丽娜 《山西广播电视大学学报》2008,13(2):61-62
交际是一个各种符号行为相互的复杂过程,参与这一过程的有词语、声音、表情与动作.副语言作为其中一种非言语信息交流符号,在实际交际中起着重要的作用.正确解读副语言符号是交际成功的必要条件. 相似文献
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定量掩蔽对测钙准确度影响的研究 总被引：1，自引：0，他引：1
在铁、铝、钙、镁、硅共存的情况下测定钙，共存组分铁、铝、镁、硅都将干扰钙的测定。根据硅、铁、铝等干扰组分与掩蔽剂反应的比例关系，分析计算出掩蔽剂的适宜加入量。实验结果表明，对干扰组分定量掩蔽，可提高测钙的准确度。 相似文献
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姬蕾 《福建师大福清分校学报》2012,(3):103-106
试图通过对声音效果在戏剧《推销员之死》中几种功能的分析,阐述其对渲染加强《推》剧主题的重要作用。声音效果在该剧中对故事结构的设置,情节的发展,人物内心世界的展现以及最后对主题的渲染加强都起着重要的作用。不同的声音、音乐和曲调,在《推》剧中早已超越了一般意义上的声音效果,使得该剧的主题和韵味在声音中得到进一步发扬。 相似文献
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提出一种结合几何谱减法的基于人耳听觉掩蔽效应的算法．通过仿真证明,该算法与一般的基于人耳听觉掩蔽效应的算法相比,能更好地减少音乐噪声,提高信噪比．在去噪的同时,减小了纯净语音的畸变,达到良好的效果． 相似文献
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Subjects typically show superior discriminative performance when a distinguishing feature appears on reinforced rather than nonreinforced trials. The phenomenon is usually attributed to the relative predictiveness of the reinforcer by different stimulus elements. However, stimulus addition may be more effective than stimulus deletion as a signal. By removing the standard intertriai intervals, we made addition and deletion equally predictive of the reinforcer in four operant experiments involving between- and within-subject comparisons. Pigeons consistently performed better on operant discriminations when the addition rather than deletion of an auditory or visual stimulus served as the cue for food. This general finding persisted despite manipulation of the relative duration and localizability of the signal. Thus mere presence as opposed to absence plays a role in the feature-positive superiority, an outcome that may reflect a fundamental, biologically based difference between addition and deletion as effective signals of reinforcement. 相似文献
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英语听力教学属于有声无形的语言教学,需要培养学生接受外语的有声语言能力和有声语言激发起的形象语言能力,这种语言的教学有其独特性。听力课程的重要性及其教学方面的独特性使大学英语听力教学成了目前探讨的重要课题。本文旨从学生实际存在的问题来谈谈提高学生听力理解能力的方法。 相似文献
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The effectiveness of noise of various intensities and frequencies in modulating the amplitude of the acoustic startle reflex was evaluated, as a preliminary test of the capacity of these noises to produce consistent and reliable fear-potentiated startle in rats. It was determined that bands of noise containing high frequencies (greater than 10 kHz) tend to unconditionally reduce acoustic startle responses, probably by masking the high-frequency startle-eliciting stimulus. Noise containing high frequencies produced reliable fear-potentiated startle only when its estimated unconditioned startle suppression was subtracted from the enhancement obtained after pairing it with footshocks. Noises devoid of high frequencies produced modest-unconditioned startle enhancements and the most robust and reliable fear-potentiated startle when they were paired with footshocks. A nonmonotonic relationship between training shock intensity and the level of fear-potentiated startle was also exhibited when a low-frequency noise was used as a conditioned stimulus, a finding consistent with previous studies in which a visual stimulus was used. Finally, a differential Pavlovian conditioning procedure indicated that rats could readily discriminate between two different low-frequency bands of noise. The outcome of these experiments indicates that it is easier to employ low-frequency bands of noise to obtain auditory fear-potentiated startle with high-frequency startle-eliciting stimuli. 相似文献
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提出了一种新的基于混沌掩蔽的保密通信方法．在发送端,信息序列在与混沌掩蔽序列相加的同时还介入到该掩蔽序列的发生之中．在接受端,一个与发送端具有相同非线性函数形式的非动力学系统被用来从接受信号中提取混沌掩蔽序列,然后再与接受信号相减以恢复信息序列．理论分析和计算机模拟表明,该方法保密性好、可靠性高且实现容易． 相似文献
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The effect of inhibiting the orienting response on information processing was examined in four experiments. A nonsignal auditory stimulus was presented four times to preweanhng rats either 30 sec or 15 min after they had been placed in an unfamiliar environment (Experiments 1A and 2), shocked (Experiment 1B)5 or experienced a shift in environmental context (Experiment 1C). Both an autonomic (heart rate) and a behavioral componentx of the orienting response to the novel stimulus were recorded. In the 15-min condition, the auditory stimulus elicited a consistent orienting response on the first trial that habituated rapidly with successive trials. In contrast, the auditory stimulus did not elicit a detectable orienting response in the 30-sec condition on any of the four trials. However, when the auditory stimulus was re-presented after a brief retention interval, a comparable level of habituation was seen in both groups. These results demonstrate that animals in the 30-sec condition detected, attended to, and encoded the auditory stimulus even though they did not orient, either autonomically or behaviorally, to that stimulus when it was first presented. This process of response-independent habituation is best described as latent habituation. Like latent learning, latent habituation took place in the absence of any observable change in behavior. The implications of this effect for current theories of habituation and of the orienting response are discussed. 相似文献
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Sixteen human subjects were presented with an instrumental task in which pressing a button to produce a visual stimulus was followed by an auditory stimulus. Half of the subjects were assigned to a condition under which pressing the button at the subject’s operant level produced less of the auditory stimulus than the subject would normally choose to receive. For the others, pressing the button at operant level produced more of the auditory stimulus than the subject would choose. Subjects in the former condition showed increases in instrumental performance; those in the latter showed decreases. The results indicated that the rewarding or punishing effects of an event depend upon the relation of the instrumental contingency to the subject’s unconstrained behavior. 相似文献