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Ruben's Tube

Aeolian Harp
When you blow air past these harp strings, they produce sounds.

Echo
An artificial echo device.

Echo Tube
A 30 metre tube which demonstrates that echoes are reflections of sound

Message through the water
Messages are sent through a tank of water as sonar pulses

Ruben's Tube
Sound is made visible with gas flames.

Sonar System
By moving a sonar transponder in a tank the outline of a model submarine can be seen on a computer screen

Sound Beats
Two loudspeakers are driven by sine-wave oscillators. Combining slightly different frequencies gives corresponding 'beats' in time.

Wait and Hear
Shows how hearing your own speech delayed by about half a second can make it difficult to carry on speaking.

Whisper Dishes
Reflection and focusing of sound using large parabolic reflectors.

 
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