No voice without resonance
Mouth, sinuses, nose, pharynx, windpipe and lung form a resonance cavity which is indispensable for singing and speech.
The tone colour is determined by the resonance and the sort of vibration of the vocal chords. Resonance and also the intensity with which the vocal chords vibrate are decisive for the loudness.
Information and ideas:
The link can be made from the physics and physiology of sound production to speech and communication as prerequisite for the development of human intelligence and social forms of human interaction.
Relevant for teaching:
Vibrations and waves