Nat Sci 1 - Ll2 Powerpoint file on sound wave

To download the powerpoint file that I was using on our last topic, please click either of these:
1. For 2010 format, click  here.
2. For 2003 format, click here
Note:
*If you are using Microsoft Office 2010, choose 2010 format, otherwise choose 2003.
*These are all compressed  (so that I could upload it easily). To view it, you should extract it first e. g. using WinRAR.
*The video clips may not work because they were hyperlinked to the original file in my computer. Nevertheless, the video clips I've shown you in the last 4 slides are extracted from a youtube video uploaded by Pauli1982, shown below.