Here there are a range of demonstrations about sound.
A signal generator is connected to a speaker and an oscilloscope.
0:00 Introduction to the equipment
1:30 Adjusting the timebase to suit the signal frequency
2:00 Example of measuring period using an oscilloscope
3:00 The Volt gain setting
3:00 Amplitude does not affect frequency
3:45 Wider range of frequencies - freq & pitch
4:15 Amplitude determines sound volume
4:35 Upper frequency limit of human hearing
5:45 Warning about hearing damage and aging
Free for non commercial educational use
