Sound as aperiodic signal
Video (00:06 minutes):
A sound event without periodicity is a "sound". The video shows the pattern in the oscilloscope.
The rustling of paper or road traffic are examples.
Information and ideas:
Suitable for demonstration purposes but also good for self-study on the part of the students.
Idea: show the film without sound to begin with. The students should then guess what sort of noise/sound it might be.
Relevant for teaching:
Communication and understanding
Vibrations and waves