Sound emission at the loudspeaker
Video (00:11 minutes):
The visibly vibrating diaphragm in the loudspeaker obviously transmits its movement onto the air as sound waves.
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