图 书 馆
听力Hearing |
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| 课程网址: | http://openlearn.open.ac.uk/course/view.php?id=3373 |
| 主讲教师: | The Open University |
| 开课单位: | 英国开放大学 |
| 开课时间: | 信息不详。欢迎您在右侧留言补充。 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | This is a free, online textbook/course that is designed to introduce the topic of hearing. "This unit examines the basic mechanisms responsible for our ability to hear. Humans are able to distinguish a remarkable range of sounds and hearing provides us with a unique source of information about what is occurring in our immediate surroundings. Our sense of hearing depends entirely on the sensory receptors of the inner ear known as hair cells. Hair cells are extremely vulnerable and can be affected by disease, ageing and over-exposure to loud noise. Once destroyed, they do not regenerate. In this unit we describe in detail the function of the cochlea, which is where the hair cells are located. We learn how sound energy is transduced into electrical signals and how a rapid-fire code of electrical impulses about the physical characteristics of a particular sound is sent to the brain. The brain interprets these signals as a musical phrase, a human voice or any of the range of sounds in the world around us at a particular moment. We also examine the central auditory nervous system pathways and describe the physiological mechanisms responsible for our sense of pitch and loudness and our ability to localise the source of a sound stimulus. Finally, we look at the main types of hearing impairment and their causes, effects and rehabilitation.״ |
| 关 键 词: | 听力; 声音; 内耳; 声能 |
| 课程来源: | 信息不详。欢迎您在右侧留言补充。 |
| 最后编审: | 2018-12-09：lyt |
| 阅读次数: | 19 |