In the education of acoustic science, it is important how the student imagine the appearances of actual acoustic phenomena. So, for teachers, it is important problems how to model the acoustic phenomena and to provide them to students. It cannot be seen by eyes though sounds are familiar as the phenomena. And that hinders students from studying the acoustic science. Therefore it is worthy for the education of the acoustic science that ties theories to phenomena by simulating acoustic phenomena, and modeling as animations or synthetic sounds on computer. The past multimedia teaching materials, which we made, have been hard to distribute. Then, we are developing web based multimedia teaching materials. They includes presentation slides, simulation programs, movies, and so on... In this paper, we introduce web based multimedia teaching materials, and report the experimental effects of them.