【摘要】 在外语教学中,语音实验室和调频广播是目前各高校普遍采用的教学设施,但二者因投入成本太大和数量有限不能充分满足师生教与学的需要。通过设计制作一种低成本高性能的微型发射台,可以将外语教学节目以调频信号形式发射到一定的范围,学生通过普通调频收音机即可收听。在教室、宿舍等场所分别设置多个发射台,每个发射台播放不同节目,学生在课外可自主收听学习内容,实现自主学习,并解决了外语调频发射台数量不足的问题。更多还原

【Abstract】 In the current foreign language teaching,the pronunciation laboratory and the broadcast teaching are the teaching methods which are used by various universities.Although these methods have some special advantages,there are still some problems.In this paper,a wireless micro-transmitter is designed.It is characterized by the functions of wireless microphone and transmitting MP3 audio signal within the scope of 40 meters.In addition,it can be used to carry out the pronunciation teaching during the foreign language teaching.Considering the condition of only one transmitting station for most universities,a number of transmitting stations,which broadcast the different contents simultaneously,can be set up in various places,such as classrooms,student halls.Students can choose the receiving information according their interest.In this way,the study is completed independently and the efficiency is improved.更多还原