Whistle
device · 3000 BC · Ancient world
A sound signal made by a stream of air.
What it is made of
- Mouthpiece — has part. A channel for blowing in air.
- Whistle edge — has part. A sharp edge that splits the air stream.
- Resonant chamber — has part. It sets the pitch.
Principles and materials it uses
- Sound wave — uses. The sound of a flow.
- Bone — is made of. Ancient whistles were carved from bone.
- Resonance — uses. Resonance of the chamber.
Where it is used
- Whistling kettle — is part of. A whistle.