Lecture4：Hearing, Auditory Models, and Speech Perception

 (听觉，听感知模型与语音感知)

本次课为第4周周二的3-5节内容，主要讲解教材的第4章节的部分内容（PPT 1-64页），包括：

1. Speech chain 语音链

2. Auditory mechanisms 听觉机理

3. Speech perception 语音感知

4. Auditory masking 听觉掩蔽
   

   
   

重点：Auditory mechanism, Speech perception

难点：Auditory masking

本次课需要学习的内容，具体讲课PPT+音频（PPT 1-64页），请点击下面文档 ：

课堂讨论：

课后作业：

1. 中文教材 107 页，题4.3：

   
   

    

4.3 的标准答案:

(a)   a 20 dB IL 1000 Hz tone has an LL of 20 phons whereas a 20 dB IL tone at 500 Hz has

an LL of 16 phons =>   the 1000 Hz tone is perceived as louder by 4 phons.

(b)  a 40 dB IL tone at 200 Hz has an LL of 20 phons whereas a 30 dB IL tone at 2000 Hz

has an LL of 33 phons=>   the 2000 Hz tone is perceived as louder by 13 phons

(c)  a 50 dB IL tone at 100 Hz has an LL of 20 phons whereas a 50 dB IL tone at 1000 Hz

has an LL of 50 phons =>   the 1000 Hz tone is perceived as louder by 30 phons