This first page could be used for middle school students was well as the link entitled waves, while other links could be used for high school students to look at the physics of how waves behave and the trigonometric realms of waves. This site has information and activities for students to use sound and waves. Making Waves, Wave Patterns, Resounance, Frequency and the Musical Scale are all covered at this site. The visual design will keep students engaged in the activities. They can make sound with rulers, design an eardrum and experience slinky sound waves.
Students can search for different sounds in the online database.
You can add sounds to the database so the students can hear the specific sounds that tie in with the lesson. This site contains simple, easy to follow instructions for a variety of experiments and demonstrations. Related links for other physical science enablers. An easy to understand tutorial. It also includes a demonstration which required sound capabilities.