期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
新德克推出SACD播放机SCD-1和SCD-2
1
《视听技术》 2002年第5期47-47,共1页
4月5日下午,成都新德克电子有限公司在上海金茂大厦召开新闻发布会,宣布向市场推出两款SACD播放机SCD—1和SCD—2。首批产品将于5月末正式进入市场,零售价为3800元。新德克公司也因此成为国内第一个生产SACD播放机的音响器材厂。
关键词 SACD播放机 CXD3D68芯片 自动适应功能 新德克公司
下载PDF
What makes a cry a cry? A review of infant distress vocalizations 被引量:3
2
作者 Susan LINGLE Megan T. WYMAN +2 位作者 Radim KOTRBA Lisa J. TEICHROEB Cora A. ROMANOW 《Current Zoology》 SCIE CAS CSCD 2012年第5期698-726,共29页
In contrast to the cries of human infants, sounds made by non-human infants in different stressful behavioral contexts (hunger or physical discomfort, isolation, capture by humans or predators) are usually treated a... In contrast to the cries of human infants, sounds made by non-human infants in different stressful behavioral contexts (hunger or physical discomfort, isolation, capture by humans or predators) are usually treated as distinct types of vocalizations. However, if distress vocalizations produced by different species and in different contexts share a common motivational state and associated neurochemical pathways, we can expect them to share a common acoustic structure and adaptive function, showing only limited variation that corresponds to the infant's level of arousal. Based on this premise, we review the acoustic structure and adaptive function of two types of distress calls, those given when infants were isolated from their mothers (isolation caUs) or captured by humans (capture calls). We conducted a within-context comparison examining the two call types across a diverse se- lection of mammalian species and other vertebrate groups, followed by a comparison of how acoustic structure and function dif- fers between these contexts. In addition, we assessed acoustic traits that are critical to the response of caregivers. Across verte- brate species, distress vocalizations produced in these two behavioral contexts tend to be tonal with a simple chevron, flat or de- scending pattern of frequency modulation. Reports that both isolation and capture calls of vertebrate infants serve to attract care- givers are universal, and the fundamental frequency of infant vocalizations is often critical to this response. The results of our re- view are consistent with the hypothesis that differences in the acoustic structure of isolation and capture distress vocalizations re- flect differences in arousal, and not discrete functions. The similarity in acoustic structure and caregiver response observed across vertebrates adds support to the hypothesis that the production and processing of distress vocalizations are part of a highly-conserved system of social vocal behaviour in vertebrates. Bioacoustic research may move forward by recognizing the commonality among different forms of infant solicitations that attract caregivers, and the commonality of these solicitations with vocalizations that attract conspecifics in still other behavioral contexts [Current Zoology 58 (5): 698-726, 2012]. 展开更多
关键词 CRYING Mother-infant communication Isolation calls Distress calls Motivational-structural rules Parental care Phylogeny
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部