The evolution of video and sound devices 1十二中学 顾阳

Let’s know each other better! Have you watched any videos or listened to music in the latest month? What kind of video or music did you enjoyed, in Chinese or other languages? Where did you get these recourses? Where did you enjoy them?

Put them in a time order Record player with a round tube Tape recorder Black and white TV CD recorder ipad Colour TV ipod DVD

More details of video and sound devices Listen to the record and answer the questions: Who developed the system used of most early TV broadcast? Who made the first recording of a human voice? What were developed by the late 1960s? John Logie Baird Thomas Edison Portable cassette players

Reorder the following sentences b Using satellites to broadcast TV. The first public TV broadcasts were made. The first colour TV programme was broadcast. The first long-distance TV broadcast was made between the UK and the USA. The principles of modern TVs were discovered by Farnsworth. d c e a

What kind of video or sound can they enjoy? People who lived in 1880 People who lived in 1890 in the America People who lived in 2005 People who lived in 1990 People who lived in1968 People who lived in 1955 People who lived in 2000 MP3 Recorder with a round tube Recorder without tubes Plastic tape DVD recorder Portable cassette CD player

Reading skill- understanding headings Reading headings helps: 1. Quickly aware of how a text is organized 2. Get an idea to the contents of each section 3. Efficiently find out the information you want

Replace the underlined words 1. The evolution of video and sound devices. A. advantage B. development C. benefit 2. His system was very primitive and had many drawbacks. A. strange B. native C. simple 3. Satellite TV makes TV accessible to people who live far away. A. changeable B. comfortable C. useful

Retell TV sound recorder sound and digital recorder Introduce the development of : TV sound recorder sound and digital recorder

Brainstorm What kind of video and sound device do you prefer? Why? Do you have any advice for inventors or scientists to deign better devices? Imagine how will you enjoy music and videos in 20 years?

Summary What have you learnt from this lesson? How will video and sound devices develop according to the author? Which part interest you most?

Homework Interview your grandparents, parents and your classmates including following points: What video and sound devices have they used? Which kind do they prefer? Why?